The clinical, histologic, and genotypic spectrum of


Journal

Neurology
ISSN: 1526-632X
Titre abrégé: Neurology
Pays: United States
ID NLM: 0401060

Informations de publication

Date de publication:
15 09 2020
Historique:
received: 09 12 2019
accepted: 25 03 2020
pubmed: 17 8 2020
medline: 5 11 2020
entrez: 16 8 2020
Statut: ppublish

Résumé

To clarify the prevalence, long-term natural history, and severity determinants of Retrospective clinical, histologic, and genetic analysis of 132 pediatric and adult patients (2-58 years) followed up for several decades. The clinical phenotype was marked by severe axial muscle weakness, spinal rigidity, and scoliosis (86.1%, from 8.9 ± 4 years), with relatively preserved limb strength and previously unreported ophthalmoparesis in severe cases. All patients developed respiratory failure (from 10.1±6 years), 81.7% requiring ventilation while ambulant. Histopathologically, 79 muscle biopsies showed large variability, partly determined by site of biopsy and age. Multi-minicores were the most common lesion (59.5%), often associated with mild dystrophic features and occasionally with eosinophilic inclusions. Identification of 65 Our results inform clinical practice, improving diagnosis and management, and represent a major breakthrough for clinical trial readiness in this not so rare disease.

Identifiants

pubmed: 32796131
pii: WNL.0000000000010327
doi: 10.1212/WNL.0000000000010327
pmc: PMC7713742
doi:

Substances chimiques

Muscle Proteins 0
SELENON protein, human 0
Selenoproteins 0

Types de publication

Journal Article Research Support, N.I.H., Intramural Research Support, Non-U.S. Gov't

Langues

eng

Sous-ensembles de citation

IM

Pagination

e1512-e1527

Informations de copyright

© 2020 American Academy of Neurology.

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Auteurs

Rocio N Villar-Quiles (RN)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Maja von der Hagen (M)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Corinne Métay (C)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Victoria Gonzalez (V)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Sandra Donkervoort (S)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Enrico Bertini (E)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Claudia Castiglioni (C)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Denys Chaigne (D)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Jaume Colomer (J)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Maria Luz Cuadrado (ML)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Marianne de Visser (M)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Isabelle Desguerre (I)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Bruno Eymard (B)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Nathalie Goemans (N)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Angela Kaindl (A)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Emmanuelle Lagrue (E)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Jürg Lütschg (J)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Edoardo Malfatti (E)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Michèle Mayer (M)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Luciano Merlini (L)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

David Orlikowski (D)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Ulrike Reuner (U)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Mustafa A Salih (MA)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Beate Schlotter-Weigel (B)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Mechthild Stoetter (M)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Volker Straub (V)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Haluk Topaloglu (H)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

J Andoni Urtizberea (JA)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Anneke van der Kooi (A)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Ekkehard Wilichowski (E)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Norma B Romero (NB)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Michel Fardeau (M)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Carsten G Bönnemann (CG)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Brigitte Estournet (B)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Pascale Richard (P)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Susana Quijano-Roy (S)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Ulrike Schara (U)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany.

Ana Ferreiro (A)

From the Basic and Translational Myology Lab (R.N.V.-Q., V.G., A.F.), UMR8251, Université de Paris/CNRS; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (R.N.V.-Q., B. Eymard, N.B.R., A.F.) and Neuromuscular Morphology Unit (N.B.R., M.F.), Institut de Myologie, Pitié-Salpêtrière Hospital, AP-HP, Paris, France; Department of Paediatric Neurology (M.v.d.H.), Medinzinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Germany; AP-HP (C.M., P.R.), Centre de Génétique Moléculaire et Chromosomique, UF Cardiogénétique et Myogénétique Moléculaire et Cellulaire, GH Pitié-Salpêtrière, Paris; Department of Neurology (V.G.), University Hospital of Montpellier, France; Neuromuscular and Neurogenetic Disorders of Childhood Section (S.D.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; Unit of Neuromuscular and Neurodegenerative Disorders (E.B.), Bambino Gesu' Children's Research Hospital, Rome, Italy; Departamento de Neurología Pediátrica (C.C.), Clínica Las Condes, Santiago, Chile; Paediatrics Department (D.C.), Hôpital de Hautepierre, Strasbourg, France; Neuromuscular Unit (J.C.), Neuropaediatrics Department, Institut de Recerca Hospital Universitari Sant Joan de Deu, Barcelona; Center for the Biomedical Research on Rare Diseases (CIBERER) (J.C.), ISCIII; Department of Neurology (M.L.C.), Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos; Department of Medicine (M.L.C.), Universidad Complutense de Madrid, Spain; Department of Neurology (M.d.V.), Amsterdam University Medical Centre, Amsterdam Neuroscience, the Netherlands; Department of Pediatric Neurology (I.D.), Necker Enfants Malades Hospital, Paris Descartes University, France; Department of Child Neurology (N.G.), University Hospitals Leuven, Belgium; Department of Pediatric Neurology (A.K.), Center for Chronically Sick Children, Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Germany; Department of Neuropediatrics (E.L.), CHRU de Tours, Université François Rabelais de Tours, UMR INSERM U1253, Tours, France; Department of Neuropediatrics (J.L.), University Children's Hospital of Basel (UKBB), Switzerland; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (E.M.), Neurology Department, Raymond-Poincaré Hospital, AP-HP, Garches; Centre de Référence des Maladies Neuromusculaires Nord/Est/Ile de France (M.M.), Service de Neuropédiatrie, Hôpital Trousseau, Paris, France; Department of Biomedical and Neuromotor Sciences (L.M.), University of Bologna, Italy; Réanimation Médicale, Physiologie-Explorations Fonctionnelles et Centre d'Investigation Clinique, UMR 1429 (D.O.), INSERM-UMR, 1179, UVSQ (D.O.), and Neuromuscular Unit, Department of Pediatric Neurology, Intensive Care and Rehabilitation, AP-HP, UVSQ Paris Saclay (B. Estournet, S.Q.-R.), Hôpital Raymond Poincaré, Garches, France; Department of Neurology (U.R.), Medizinische Fakultät Carl Gustav Carus Technische Universität Dresden, German; Division of Pediatric Neurology, Department of Pediatrics (M.A.S.), College of Medicine, King Saud University, Riyadh, Saudi Arabia; Friedrich-Baur-Institut (B.S.-W.), Department of Neurology, Ludwig-Maximilians-University of Munich; Department of Pediatric Neurology (M.S.), University of Tübingen, Germany; The John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University, Newcastle Hospitals NHS Foundation Trust, UK; Department of Child Neurology (H.T.), Hacettepe University, School of Medicine, Ankara, Turkey; Centre de Compétence Neuromusculaire (J.A.U.), Hôpital Marin, Hendaye, France; Department of Neurology (A.v.d.K.), Amsterdam UMC, University of Amsterdam, Amsterdam Neuroscience, the Netherlands; Pediatrics and Adolescent Medicine, Division of Pediatric Neurology (E.W.), University Medical Center Göttingen, Georg-August University Göttingen, Germany; Neuromuscular and Neurogenetic Disorders of Childhood Section (C.G.B.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD; and Department of Pediatric Neurology (U.S.), Developmental Neurology and Social Pediatrics, University of Essen, Germany. ana.b.ferreiro@gmail.com.

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