International Recommendations for the Diagnosis and Management of Patients With Adrenoleukodystrophy: A Consensus-Based Approach.


Journal

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

Informations de publication

Date de publication:
22 11 2022
Historique:
received: 03 02 2022
accepted: 23 08 2022
pubmed: 30 9 2022
medline: 24 11 2022
entrez: 29 9 2022
Statut: ppublish

Résumé

Pathogenic variants in the

Identifiants

pubmed: 36175155
pii: WNL.0000000000201374
doi: 10.1212/WNL.0000000000201374
pmc: PMC9687408
doi:

Types de publication

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

Langues

eng

Sous-ensembles de citation

IM

Pagination

940-951

Subventions

Organisme : NINDS NIH HHS
ID : K23 NS118044
Pays : United States

Commentaires et corrections

Type : CommentIn

Informations de copyright

Copyright © 2022 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of the American Academy of Neurology.

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Auteurs

Marc Engelen (M)

From the Department of Pediatric Neurology/Emma Children's Hospital (M.E., W.J.C.B., I.C.H.), Amsterdam UMC, Amsterdam Leukodystrophy Center, University of Amsterdam, the Netherlands; Division of Child Neurology (E.J.M.), Department of Pediatrics, Weill Cornell Medicine/NewYork-Presbyterian Hospital, NY; Department of Neurology & Pediatrics/Lucile Packard Children's Hospital (K.P.V.H.), Stanford University School of Medicine, Palo Alto, CA 4. Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Germany; Unit of Rare Neurodegenerative and Neurometabolic Diseases (E.S.), Fondazione IRCCS Istituto Neurologico C. Besta, Milano, Italy; Department of Pediatric Endocrinology/Emma Children's Hospital (A.S.P.T.), Amsterdam UMC, University of Amsterdam, the Netherlands; AP-HP (F.M.), Department of Medical Genetics, Reference Center for Adult Neurometabolic Diseases and Leukodystrophies, and INSERM U 1127, CNRS UMR 7225, Paris Brain Institute, La Pitié-Salpêtrière University Hospital, Paris, France; Department of Pediatric Neurology/Hôpital Bicêtre Paris Sud (C.S.), France, Reference Center for Children Leukodystrophies Inserm U1127, ICM-Hôpital Pitié Salpêtrière, Paris, France; Division of Pediatric Endocrinology and Diabetes (M.O.R.), Children's Hospital at Montefiore, Albert Einstein College of Medicine of Medicine, Bronx, NY; Neuroendocrine Unit (N.A.T.), Massachusetts General Hospital, Boston, MA; Harvard Medical School (N.A.T.), Boston, MA; Division of Pediatric Endocrinology (A.H.), Department of Pediatrics, Massachusetts General Hospital, Boston, MA, and Harvard Medical School (A.H.), Boston, MA; Charles Dent Metabolic Unit (R.H.L.), National Hospital for Neurology and Neurosurgery, London, United Kingdom; Metabolic Medicine (J.D.), Great Ormond Street Hospital for Children, London United Kingdom; Department of Genetic Medicine (G.V.R.), Johns Hopkins, Baltimore, MD; Division of Pediatric Blood and Marrow Transplantation & Cellular Therapy (T.L., P.J.O.), University of Minnesota, Minneapolis; Pediatric Oncology (J.-S.K.), Hematology, Hemostaseology, University Hospital Leipzig, Germany; Pediatric Blood and Bone Marrow Transplantation (C.A.L.), Princess Maxima Center Utrecht, the Netherlands; Department of Pediatrics (C.A.L.), Wilhemina Children's Hospital, UMC Utrecht, Utrecht University, the Netherlands; Director of Pediatric Neuroimaging (P.C.), Lenox Hill Radiology and Medical Imaging Associates, New York, NY; Moser Center for Leukodystrophies (B.R.T., A.F.), Kennedy Krieger Institute, Johns Hopkins Medical Institutions, Baltimore, MD; Department of Neurogenetics (A.B.M.), Kennedy Krieger Institute, Baltimore, MD; Laboratory Genetic Metabolic Diseases (F.M.V., S.F., S.K.), Department of Clinical Chemistry and Pediatrics, Amsterdam UMC, Amsterdam Gastroenterology Endocrinology Metabolism, University of Amsterdam, the Netherlands; and Department of Neurology (F.S.E.), Massachusetts General Hospital, Boston, MA. Dr. van Ballegoij is currently at the Department of Neurology, Zaans Medisch Centrum, Zaandam. m.engelen@amsterdamumc.nl.

Wouter J C van Ballegoij (WJC)

From the Department of Pediatric Neurology/Emma Children's Hospital (M.E., W.J.C.B., I.C.H.), Amsterdam UMC, Amsterdam Leukodystrophy Center, University of Amsterdam, the Netherlands; Division of Child Neurology (E.J.M.), Department of Pediatrics, Weill Cornell Medicine/NewYork-Presbyterian Hospital, NY; Department of Neurology & Pediatrics/Lucile Packard Children's Hospital (K.P.V.H.), Stanford University School of Medicine, Palo Alto, CA 4. Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Germany; Unit of Rare Neurodegenerative and Neurometabolic Diseases (E.S.), Fondazione IRCCS Istituto Neurologico C. Besta, Milano, Italy; Department of Pediatric Endocrinology/Emma Children's Hospital (A.S.P.T.), Amsterdam UMC, University of Amsterdam, the Netherlands; AP-HP (F.M.), Department of Medical Genetics, Reference Center for Adult Neurometabolic Diseases and Leukodystrophies, and INSERM U 1127, CNRS UMR 7225, Paris Brain Institute, La Pitié-Salpêtrière University Hospital, Paris, France; Department of Pediatric Neurology/Hôpital Bicêtre Paris Sud (C.S.), France, Reference Center for Children Leukodystrophies Inserm U1127, ICM-Hôpital Pitié Salpêtrière, Paris, France; Division of Pediatric Endocrinology and Diabetes (M.O.R.), Children's Hospital at Montefiore, Albert Einstein College of Medicine of Medicine, Bronx, NY; Neuroendocrine Unit (N.A.T.), Massachusetts General Hospital, Boston, MA; Harvard Medical School (N.A.T.), Boston, MA; Division of Pediatric Endocrinology (A.H.), Department of Pediatrics, Massachusetts General Hospital, Boston, MA, and Harvard Medical School (A.H.), Boston, MA; Charles Dent Metabolic Unit (R.H.L.), National Hospital for Neurology and Neurosurgery, London, United Kingdom; Metabolic Medicine (J.D.), Great Ormond Street Hospital for Children, London United Kingdom; Department of Genetic Medicine (G.V.R.), Johns Hopkins, Baltimore, MD; Division of Pediatric Blood and Marrow Transplantation & Cellular Therapy (T.L., P.J.O.), University of Minnesota, Minneapolis; Pediatric Oncology (J.-S.K.), Hematology, Hemostaseology, University Hospital Leipzig, Germany; Pediatric Blood and Bone Marrow Transplantation (C.A.L.), Princess Maxima Center Utrecht, the Netherlands; Department of Pediatrics (C.A.L.), Wilhemina Children's Hospital, UMC Utrecht, Utrecht University, the Netherlands; Director of Pediatric Neuroimaging (P.C.), Lenox Hill Radiology and Medical Imaging Associates, New York, NY; Moser Center for Leukodystrophies (B.R.T., A.F.), Kennedy Krieger Institute, Johns Hopkins Medical Institutions, Baltimore, MD; Department of Neurogenetics (A.B.M.), Kennedy Krieger Institute, Baltimore, MD; Laboratory Genetic Metabolic Diseases (F.M.V., S.F., S.K.), Department of Clinical Chemistry and Pediatrics, Amsterdam UMC, Amsterdam Gastroenterology Endocrinology Metabolism, University of Amsterdam, the Netherlands; and Department of Neurology (F.S.E.), Massachusetts General Hospital, Boston, MA. Dr. van Ballegoij is currently at the Department of Neurology, Zaans Medisch Centrum, Zaandam.

Eric James Mallack (EJ)

From the Department of Pediatric Neurology/Emma Children's Hospital (M.E., W.J.C.B., I.C.H.), Amsterdam UMC, Amsterdam Leukodystrophy Center, University of Amsterdam, the Netherlands; Division of Child Neurology (E.J.M.), Department of Pediatrics, Weill Cornell Medicine/NewYork-Presbyterian Hospital, NY; Department of Neurology & Pediatrics/Lucile Packard Children's Hospital (K.P.V.H.), Stanford University School of Medicine, Palo Alto, CA 4. Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Germany; Unit of Rare Neurodegenerative and Neurometabolic Diseases (E.S.), Fondazione IRCCS Istituto Neurologico C. Besta, Milano, Italy; Department of Pediatric Endocrinology/Emma Children's Hospital (A.S.P.T.), Amsterdam UMC, University of Amsterdam, the Netherlands; AP-HP (F.M.), Department of Medical Genetics, Reference Center for Adult Neurometabolic Diseases and Leukodystrophies, and INSERM U 1127, CNRS UMR 7225, Paris Brain Institute, La Pitié-Salpêtrière University Hospital, Paris, France; Department of Pediatric Neurology/Hôpital Bicêtre Paris Sud (C.S.), France, Reference Center for Children Leukodystrophies Inserm U1127, ICM-Hôpital Pitié Salpêtrière, Paris, France; Division of Pediatric Endocrinology and Diabetes (M.O.R.), Children's Hospital at Montefiore, Albert Einstein College of Medicine of Medicine, Bronx, NY; Neuroendocrine Unit (N.A.T.), Massachusetts General Hospital, Boston, MA; Harvard Medical School (N.A.T.), Boston, MA; Division of Pediatric Endocrinology (A.H.), Department of Pediatrics, Massachusetts General Hospital, Boston, MA, and Harvard Medical School (A.H.), Boston, MA; Charles Dent Metabolic Unit (R.H.L.), National Hospital for Neurology and Neurosurgery, London, United Kingdom; Metabolic Medicine (J.D.), Great Ormond Street Hospital for Children, London United Kingdom; Department of Genetic Medicine (G.V.R.), Johns Hopkins, Baltimore, MD; Division of Pediatric Blood and Marrow Transplantation & Cellular Therapy (T.L., P.J.O.), University of Minnesota, Minneapolis; Pediatric Oncology (J.-S.K.), Hematology, Hemostaseology, University Hospital Leipzig, Germany; Pediatric Blood and Bone Marrow Transplantation (C.A.L.), Princess Maxima Center Utrecht, the Netherlands; Department of Pediatrics (C.A.L.), Wilhemina Children's Hospital, UMC Utrecht, Utrecht University, the Netherlands; Director of Pediatric Neuroimaging (P.C.), Lenox Hill Radiology and Medical Imaging Associates, New York, NY; Moser Center for Leukodystrophies (B.R.T., A.F.), Kennedy Krieger Institute, Johns Hopkins Medical Institutions, Baltimore, MD; Department of Neurogenetics (A.B.M.), Kennedy Krieger Institute, Baltimore, MD; Laboratory Genetic Metabolic Diseases (F.M.V., S.F., S.K.), Department of Clinical Chemistry and Pediatrics, Amsterdam UMC, Amsterdam Gastroenterology Endocrinology Metabolism, University of Amsterdam, the Netherlands; and Department of Neurology (F.S.E.), Massachusetts General Hospital, Boston, MA. Dr. van Ballegoij is currently at the Department of Neurology, Zaans Medisch Centrum, Zaandam.

Keith P Van Haren (KP)

From the Department of Pediatric Neurology/Emma Children's Hospital (M.E., W.J.C.B., I.C.H.), Amsterdam UMC, Amsterdam Leukodystrophy Center, University of Amsterdam, the Netherlands; Division of Child Neurology (E.J.M.), Department of Pediatrics, Weill Cornell Medicine/NewYork-Presbyterian Hospital, NY; Department of Neurology & Pediatrics/Lucile Packard Children's Hospital (K.P.V.H.), Stanford University School of Medicine, Palo Alto, CA 4. Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Germany; Unit of Rare Neurodegenerative and Neurometabolic Diseases (E.S.), Fondazione IRCCS Istituto Neurologico C. Besta, Milano, Italy; Department of Pediatric Endocrinology/Emma Children's Hospital (A.S.P.T.), Amsterdam UMC, University of Amsterdam, the Netherlands; AP-HP (F.M.), Department of Medical Genetics, Reference Center for Adult Neurometabolic Diseases and Leukodystrophies, and INSERM U 1127, CNRS UMR 7225, Paris Brain Institute, La Pitié-Salpêtrière University Hospital, Paris, France; Department of Pediatric Neurology/Hôpital Bicêtre Paris Sud (C.S.), France, Reference Center for Children Leukodystrophies Inserm U1127, ICM-Hôpital Pitié Salpêtrière, Paris, France; Division of Pediatric Endocrinology and Diabetes (M.O.R.), Children's Hospital at Montefiore, Albert Einstein College of Medicine of Medicine, Bronx, NY; Neuroendocrine Unit (N.A.T.), Massachusetts General Hospital, Boston, MA; Harvard Medical School (N.A.T.), Boston, MA; Division of Pediatric Endocrinology (A.H.), Department of Pediatrics, Massachusetts General Hospital, Boston, MA, and Harvard Medical School (A.H.), Boston, MA; Charles Dent Metabolic Unit (R.H.L.), National Hospital for Neurology and Neurosurgery, London, United Kingdom; Metabolic Medicine (J.D.), Great Ormond Street Hospital for Children, London United Kingdom; Department of Genetic Medicine (G.V.R.), Johns Hopkins, Baltimore, MD; Division of Pediatric Blood and Marrow Transplantation & Cellular Therapy (T.L., P.J.O.), University of Minnesota, Minneapolis; Pediatric Oncology (J.-S.K.), Hematology, Hemostaseology, University Hospital Leipzig, Germany; Pediatric Blood and Bone Marrow Transplantation (C.A.L.), Princess Maxima Center Utrecht, the Netherlands; Department of Pediatrics (C.A.L.), Wilhemina Children's Hospital, UMC Utrecht, Utrecht University, the Netherlands; Director of Pediatric Neuroimaging (P.C.), Lenox Hill Radiology and Medical Imaging Associates, New York, NY; Moser Center for Leukodystrophies (B.R.T., A.F.), Kennedy Krieger Institute, Johns Hopkins Medical Institutions, Baltimore, MD; Department of Neurogenetics (A.B.M.), Kennedy Krieger Institute, Baltimore, MD; Laboratory Genetic Metabolic Diseases (F.M.V., S.F., S.K.), Department of Clinical Chemistry and Pediatrics, Amsterdam UMC, Amsterdam Gastroenterology Endocrinology Metabolism, University of Amsterdam, the Netherlands; and Department of Neurology (F.S.E.), Massachusetts General Hospital, Boston, MA. Dr. van Ballegoij is currently at the Department of Neurology, Zaans Medisch Centrum, Zaandam.

Wolfgang Köhler (W)

From the Department of Pediatric Neurology/Emma Children's Hospital (M.E., W.J.C.B., I.C.H.), Amsterdam UMC, Amsterdam Leukodystrophy Center, University of Amsterdam, the Netherlands; Division of Child Neurology (E.J.M.), Department of Pediatrics, Weill Cornell Medicine/NewYork-Presbyterian Hospital, NY; Department of Neurology & Pediatrics/Lucile Packard Children's Hospital (K.P.V.H.), Stanford University School of Medicine, Palo Alto, CA 4. Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Germany; Unit of Rare Neurodegenerative and Neurometabolic Diseases (E.S.), Fondazione IRCCS Istituto Neurologico C. Besta, Milano, Italy; Department of Pediatric Endocrinology/Emma Children's Hospital (A.S.P.T.), Amsterdam UMC, University of Amsterdam, the Netherlands; AP-HP (F.M.), Department of Medical Genetics, Reference Center for Adult Neurometabolic Diseases and Leukodystrophies, and INSERM U 1127, CNRS UMR 7225, Paris Brain Institute, La Pitié-Salpêtrière University Hospital, Paris, France; Department of Pediatric Neurology/Hôpital Bicêtre Paris Sud (C.S.), France, Reference Center for Children Leukodystrophies Inserm U1127, ICM-Hôpital Pitié Salpêtrière, Paris, France; Division of Pediatric Endocrinology and Diabetes (M.O.R.), Children's Hospital at Montefiore, Albert Einstein College of Medicine of Medicine, Bronx, NY; Neuroendocrine Unit (N.A.T.), Massachusetts General Hospital, Boston, MA; Harvard Medical School (N.A.T.), Boston, MA; Division of Pediatric Endocrinology (A.H.), Department of Pediatrics, Massachusetts General Hospital, Boston, MA, and Harvard Medical School (A.H.), Boston, MA; Charles Dent Metabolic Unit (R.H.L.), National Hospital for Neurology and Neurosurgery, London, United Kingdom; Metabolic Medicine (J.D.), Great Ormond Street Hospital for Children, London United Kingdom; Department of Genetic Medicine (G.V.R.), Johns Hopkins, Baltimore, MD; Division of Pediatric Blood and Marrow Transplantation & Cellular Therapy (T.L., P.J.O.), University of Minnesota, Minneapolis; Pediatric Oncology (J.-S.K.), Hematology, Hemostaseology, University Hospital Leipzig, Germany; Pediatric Blood and Bone Marrow Transplantation (C.A.L.), Princess Maxima Center Utrecht, the Netherlands; Department of Pediatrics (C.A.L.), Wilhemina Children's Hospital, UMC Utrecht, Utrecht University, the Netherlands; Director of Pediatric Neuroimaging (P.C.), Lenox Hill Radiology and Medical Imaging Associates, New York, NY; Moser Center for Leukodystrophies (B.R.T., A.F.), Kennedy Krieger Institute, Johns Hopkins Medical Institutions, Baltimore, MD; Department of Neurogenetics (A.B.M.), Kennedy Krieger Institute, Baltimore, MD; Laboratory Genetic Metabolic Diseases (F.M.V., S.F., S.K.), Department of Clinical Chemistry and Pediatrics, Amsterdam UMC, Amsterdam Gastroenterology Endocrinology Metabolism, University of Amsterdam, the Netherlands; and Department of Neurology (F.S.E.), Massachusetts General Hospital, Boston, MA. Dr. van Ballegoij is currently at the Department of Neurology, Zaans Medisch Centrum, Zaandam.

Ettore Salsano (E)

From the Department of Pediatric Neurology/Emma Children's Hospital (M.E., W.J.C.B., I.C.H.), Amsterdam UMC, Amsterdam Leukodystrophy Center, University of Amsterdam, the Netherlands; Division of Child Neurology (E.J.M.), Department of Pediatrics, Weill Cornell Medicine/NewYork-Presbyterian Hospital, NY; Department of Neurology & Pediatrics/Lucile Packard Children's Hospital (K.P.V.H.), Stanford University School of Medicine, Palo Alto, CA 4. Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Germany; Unit of Rare Neurodegenerative and Neurometabolic Diseases (E.S.), Fondazione IRCCS Istituto Neurologico C. Besta, Milano, Italy; Department of Pediatric Endocrinology/Emma Children's Hospital (A.S.P.T.), Amsterdam UMC, University of Amsterdam, the Netherlands; AP-HP (F.M.), Department of Medical Genetics, Reference Center for Adult Neurometabolic Diseases and Leukodystrophies, and INSERM U 1127, CNRS UMR 7225, Paris Brain Institute, La Pitié-Salpêtrière University Hospital, Paris, France; Department of Pediatric Neurology/Hôpital Bicêtre Paris Sud (C.S.), France, Reference Center for Children Leukodystrophies Inserm U1127, ICM-Hôpital Pitié Salpêtrière, Paris, France; Division of Pediatric Endocrinology and Diabetes (M.O.R.), Children's Hospital at Montefiore, Albert Einstein College of Medicine of Medicine, Bronx, NY; Neuroendocrine Unit (N.A.T.), Massachusetts General Hospital, Boston, MA; Harvard Medical School (N.A.T.), Boston, MA; Division of Pediatric Endocrinology (A.H.), Department of Pediatrics, Massachusetts General Hospital, Boston, MA, and Harvard Medical School (A.H.), Boston, MA; Charles Dent Metabolic Unit (R.H.L.), National Hospital for Neurology and Neurosurgery, London, United Kingdom; Metabolic Medicine (J.D.), Great Ormond Street Hospital for Children, London United Kingdom; Department of Genetic Medicine (G.V.R.), Johns Hopkins, Baltimore, MD; Division of Pediatric Blood and Marrow Transplantation & Cellular Therapy (T.L., P.J.O.), University of Minnesota, Minneapolis; Pediatric Oncology (J.-S.K.), Hematology, Hemostaseology, University Hospital Leipzig, Germany; Pediatric Blood and Bone Marrow Transplantation (C.A.L.), Princess Maxima Center Utrecht, the Netherlands; Department of Pediatrics (C.A.L.), Wilhemina Children's Hospital, UMC Utrecht, Utrecht University, the Netherlands; Director of Pediatric Neuroimaging (P.C.), Lenox Hill Radiology and Medical Imaging Associates, New York, NY; Moser Center for Leukodystrophies (B.R.T., A.F.), Kennedy Krieger Institute, Johns Hopkins Medical Institutions, Baltimore, MD; Department of Neurogenetics (A.B.M.), Kennedy Krieger Institute, Baltimore, MD; Laboratory Genetic Metabolic Diseases (F.M.V., S.F., S.K.), Department of Clinical Chemistry and Pediatrics, Amsterdam UMC, Amsterdam Gastroenterology Endocrinology Metabolism, University of Amsterdam, the Netherlands; and Department of Neurology (F.S.E.), Massachusetts General Hospital, Boston, MA. Dr. van Ballegoij is currently at the Department of Neurology, Zaans Medisch Centrum, Zaandam.

A S P van Trotsenburg (ASP)

From the Department of Pediatric Neurology/Emma Children's Hospital (M.E., W.J.C.B., I.C.H.), Amsterdam UMC, Amsterdam Leukodystrophy Center, University of Amsterdam, the Netherlands; Division of Child Neurology (E.J.M.), Department of Pediatrics, Weill Cornell Medicine/NewYork-Presbyterian Hospital, NY; Department of Neurology & Pediatrics/Lucile Packard Children's Hospital (K.P.V.H.), Stanford University School of Medicine, Palo Alto, CA 4. Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Germany; Unit of Rare Neurodegenerative and Neurometabolic Diseases (E.S.), Fondazione IRCCS Istituto Neurologico C. Besta, Milano, Italy; Department of Pediatric Endocrinology/Emma Children's Hospital (A.S.P.T.), Amsterdam UMC, University of Amsterdam, the Netherlands; AP-HP (F.M.), Department of Medical Genetics, Reference Center for Adult Neurometabolic Diseases and Leukodystrophies, and INSERM U 1127, CNRS UMR 7225, Paris Brain Institute, La Pitié-Salpêtrière University Hospital, Paris, France; Department of Pediatric Neurology/Hôpital Bicêtre Paris Sud (C.S.), France, Reference Center for Children Leukodystrophies Inserm U1127, ICM-Hôpital Pitié Salpêtrière, Paris, France; Division of Pediatric Endocrinology and Diabetes (M.O.R.), Children's Hospital at Montefiore, Albert Einstein College of Medicine of Medicine, Bronx, NY; Neuroendocrine Unit (N.A.T.), Massachusetts General Hospital, Boston, MA; Harvard Medical School (N.A.T.), Boston, MA; Division of Pediatric Endocrinology (A.H.), Department of Pediatrics, Massachusetts General Hospital, Boston, MA, and Harvard Medical School (A.H.), Boston, MA; Charles Dent Metabolic Unit (R.H.L.), National Hospital for Neurology and Neurosurgery, London, United Kingdom; Metabolic Medicine (J.D.), Great Ormond Street Hospital for Children, London United Kingdom; Department of Genetic Medicine (G.V.R.), Johns Hopkins, Baltimore, MD; Division of Pediatric Blood and Marrow Transplantation & Cellular Therapy (T.L., P.J.O.), University of Minnesota, Minneapolis; Pediatric Oncology (J.-S.K.), Hematology, Hemostaseology, University Hospital Leipzig, Germany; Pediatric Blood and Bone Marrow Transplantation (C.A.L.), Princess Maxima Center Utrecht, the Netherlands; Department of Pediatrics (C.A.L.), Wilhemina Children's Hospital, UMC Utrecht, Utrecht University, the Netherlands; Director of Pediatric Neuroimaging (P.C.), Lenox Hill Radiology and Medical Imaging Associates, New York, NY; Moser Center for Leukodystrophies (B.R.T., A.F.), Kennedy Krieger Institute, Johns Hopkins Medical Institutions, Baltimore, MD; Department of Neurogenetics (A.B.M.), Kennedy Krieger Institute, Baltimore, MD; Laboratory Genetic Metabolic Diseases (F.M.V., S.F., S.K.), Department of Clinical Chemistry and Pediatrics, Amsterdam UMC, Amsterdam Gastroenterology Endocrinology Metabolism, University of Amsterdam, the Netherlands; and Department of Neurology (F.S.E.), Massachusetts General Hospital, Boston, MA. Dr. van Ballegoij is currently at the Department of Neurology, Zaans Medisch Centrum, Zaandam.

Fanny Mochel (F)

From the Department of Pediatric Neurology/Emma Children's Hospital (M.E., W.J.C.B., I.C.H.), Amsterdam UMC, Amsterdam Leukodystrophy Center, University of Amsterdam, the Netherlands; Division of Child Neurology (E.J.M.), Department of Pediatrics, Weill Cornell Medicine/NewYork-Presbyterian Hospital, NY; Department of Neurology & Pediatrics/Lucile Packard Children's Hospital (K.P.V.H.), Stanford University School of Medicine, Palo Alto, CA 4. Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Germany; Unit of Rare Neurodegenerative and Neurometabolic Diseases (E.S.), Fondazione IRCCS Istituto Neurologico C. Besta, Milano, Italy; Department of Pediatric Endocrinology/Emma Children's Hospital (A.S.P.T.), Amsterdam UMC, University of Amsterdam, the Netherlands; AP-HP (F.M.), Department of Medical Genetics, Reference Center for Adult Neurometabolic Diseases and Leukodystrophies, and INSERM U 1127, CNRS UMR 7225, Paris Brain Institute, La Pitié-Salpêtrière University Hospital, Paris, France; Department of Pediatric Neurology/Hôpital Bicêtre Paris Sud (C.S.), France, Reference Center for Children Leukodystrophies Inserm U1127, ICM-Hôpital Pitié Salpêtrière, Paris, France; Division of Pediatric Endocrinology and Diabetes (M.O.R.), Children's Hospital at Montefiore, Albert Einstein College of Medicine of Medicine, Bronx, NY; Neuroendocrine Unit (N.A.T.), Massachusetts General Hospital, Boston, MA; Harvard Medical School (N.A.T.), Boston, MA; Division of Pediatric Endocrinology (A.H.), Department of Pediatrics, Massachusetts General Hospital, Boston, MA, and Harvard Medical School (A.H.), Boston, MA; Charles Dent Metabolic Unit (R.H.L.), National Hospital for Neurology and Neurosurgery, London, United Kingdom; Metabolic Medicine (J.D.), Great Ormond Street Hospital for Children, London United Kingdom; Department of Genetic Medicine (G.V.R.), Johns Hopkins, Baltimore, MD; Division of Pediatric Blood and Marrow Transplantation & Cellular Therapy (T.L., P.J.O.), University of Minnesota, Minneapolis; Pediatric Oncology (J.-S.K.), Hematology, Hemostaseology, University Hospital Leipzig, Germany; Pediatric Blood and Bone Marrow Transplantation (C.A.L.), Princess Maxima Center Utrecht, the Netherlands; Department of Pediatrics (C.A.L.), Wilhemina Children's Hospital, UMC Utrecht, Utrecht University, the Netherlands; Director of Pediatric Neuroimaging (P.C.), Lenox Hill Radiology and Medical Imaging Associates, New York, NY; Moser Center for Leukodystrophies (B.R.T., A.F.), Kennedy Krieger Institute, Johns Hopkins Medical Institutions, Baltimore, MD; Department of Neurogenetics (A.B.M.), Kennedy Krieger Institute, Baltimore, MD; Laboratory Genetic Metabolic Diseases (F.M.V., S.F., S.K.), Department of Clinical Chemistry and Pediatrics, Amsterdam UMC, Amsterdam Gastroenterology Endocrinology Metabolism, University of Amsterdam, the Netherlands; and Department of Neurology (F.S.E.), Massachusetts General Hospital, Boston, MA. Dr. van Ballegoij is currently at the Department of Neurology, Zaans Medisch Centrum, Zaandam.

Caroline Sevin (C)

From the Department of Pediatric Neurology/Emma Children's Hospital (M.E., W.J.C.B., I.C.H.), Amsterdam UMC, Amsterdam Leukodystrophy Center, University of Amsterdam, the Netherlands; Division of Child Neurology (E.J.M.), Department of Pediatrics, Weill Cornell Medicine/NewYork-Presbyterian Hospital, NY; Department of Neurology & Pediatrics/Lucile Packard Children's Hospital (K.P.V.H.), Stanford University School of Medicine, Palo Alto, CA 4. Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Germany; Unit of Rare Neurodegenerative and Neurometabolic Diseases (E.S.), Fondazione IRCCS Istituto Neurologico C. Besta, Milano, Italy; Department of Pediatric Endocrinology/Emma Children's Hospital (A.S.P.T.), Amsterdam UMC, University of Amsterdam, the Netherlands; AP-HP (F.M.), Department of Medical Genetics, Reference Center for Adult Neurometabolic Diseases and Leukodystrophies, and INSERM U 1127, CNRS UMR 7225, Paris Brain Institute, La Pitié-Salpêtrière University Hospital, Paris, France; Department of Pediatric Neurology/Hôpital Bicêtre Paris Sud (C.S.), France, Reference Center for Children Leukodystrophies Inserm U1127, ICM-Hôpital Pitié Salpêtrière, Paris, France; Division of Pediatric Endocrinology and Diabetes (M.O.R.), Children's Hospital at Montefiore, Albert Einstein College of Medicine of Medicine, Bronx, NY; Neuroendocrine Unit (N.A.T.), Massachusetts General Hospital, Boston, MA; Harvard Medical School (N.A.T.), Boston, MA; Division of Pediatric Endocrinology (A.H.), Department of Pediatrics, Massachusetts General Hospital, Boston, MA, and Harvard Medical School (A.H.), Boston, MA; Charles Dent Metabolic Unit (R.H.L.), National Hospital for Neurology and Neurosurgery, London, United Kingdom; Metabolic Medicine (J.D.), Great Ormond Street Hospital for Children, London United Kingdom; Department of Genetic Medicine (G.V.R.), Johns Hopkins, Baltimore, MD; Division of Pediatric Blood and Marrow Transplantation & Cellular Therapy (T.L., P.J.O.), University of Minnesota, Minneapolis; Pediatric Oncology (J.-S.K.), Hematology, Hemostaseology, University Hospital Leipzig, Germany; Pediatric Blood and Bone Marrow Transplantation (C.A.L.), Princess Maxima Center Utrecht, the Netherlands; Department of Pediatrics (C.A.L.), Wilhemina Children's Hospital, UMC Utrecht, Utrecht University, the Netherlands; Director of Pediatric Neuroimaging (P.C.), Lenox Hill Radiology and Medical Imaging Associates, New York, NY; Moser Center for Leukodystrophies (B.R.T., A.F.), Kennedy Krieger Institute, Johns Hopkins Medical Institutions, Baltimore, MD; Department of Neurogenetics (A.B.M.), Kennedy Krieger Institute, Baltimore, MD; Laboratory Genetic Metabolic Diseases (F.M.V., S.F., S.K.), Department of Clinical Chemistry and Pediatrics, Amsterdam UMC, Amsterdam Gastroenterology Endocrinology Metabolism, University of Amsterdam, the Netherlands; and Department of Neurology (F.S.E.), Massachusetts General Hospital, Boston, MA. Dr. van Ballegoij is currently at the Department of Neurology, Zaans Medisch Centrum, Zaandam.

Molly O Regelmann (MO)

From the Department of Pediatric Neurology/Emma Children's Hospital (M.E., W.J.C.B., I.C.H.), Amsterdam UMC, Amsterdam Leukodystrophy Center, University of Amsterdam, the Netherlands; Division of Child Neurology (E.J.M.), Department of Pediatrics, Weill Cornell Medicine/NewYork-Presbyterian Hospital, NY; Department of Neurology & Pediatrics/Lucile Packard Children's Hospital (K.P.V.H.), Stanford University School of Medicine, Palo Alto, CA 4. Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Germany; Unit of Rare Neurodegenerative and Neurometabolic Diseases (E.S.), Fondazione IRCCS Istituto Neurologico C. Besta, Milano, Italy; Department of Pediatric Endocrinology/Emma Children's Hospital (A.S.P.T.), Amsterdam UMC, University of Amsterdam, the Netherlands; AP-HP (F.M.), Department of Medical Genetics, Reference Center for Adult Neurometabolic Diseases and Leukodystrophies, and INSERM U 1127, CNRS UMR 7225, Paris Brain Institute, La Pitié-Salpêtrière University Hospital, Paris, France; Department of Pediatric Neurology/Hôpital Bicêtre Paris Sud (C.S.), France, Reference Center for Children Leukodystrophies Inserm U1127, ICM-Hôpital Pitié Salpêtrière, Paris, France; Division of Pediatric Endocrinology and Diabetes (M.O.R.), Children's Hospital at Montefiore, Albert Einstein College of Medicine of Medicine, Bronx, NY; Neuroendocrine Unit (N.A.T.), Massachusetts General Hospital, Boston, MA; Harvard Medical School (N.A.T.), Boston, MA; Division of Pediatric Endocrinology (A.H.), Department of Pediatrics, Massachusetts General Hospital, Boston, MA, and Harvard Medical School (A.H.), Boston, MA; Charles Dent Metabolic Unit (R.H.L.), National Hospital for Neurology and Neurosurgery, London, United Kingdom; Metabolic Medicine (J.D.), Great Ormond Street Hospital for Children, London United Kingdom; Department of Genetic Medicine (G.V.R.), Johns Hopkins, Baltimore, MD; Division of Pediatric Blood and Marrow Transplantation & Cellular Therapy (T.L., P.J.O.), University of Minnesota, Minneapolis; Pediatric Oncology (J.-S.K.), Hematology, Hemostaseology, University Hospital Leipzig, Germany; Pediatric Blood and Bone Marrow Transplantation (C.A.L.), Princess Maxima Center Utrecht, the Netherlands; Department of Pediatrics (C.A.L.), Wilhemina Children's Hospital, UMC Utrecht, Utrecht University, the Netherlands; Director of Pediatric Neuroimaging (P.C.), Lenox Hill Radiology and Medical Imaging Associates, New York, NY; Moser Center for Leukodystrophies (B.R.T., A.F.), Kennedy Krieger Institute, Johns Hopkins Medical Institutions, Baltimore, MD; Department of Neurogenetics (A.B.M.), Kennedy Krieger Institute, Baltimore, MD; Laboratory Genetic Metabolic Diseases (F.M.V., S.F., S.K.), Department of Clinical Chemistry and Pediatrics, Amsterdam UMC, Amsterdam Gastroenterology Endocrinology Metabolism, University of Amsterdam, the Netherlands; and Department of Neurology (F.S.E.), Massachusetts General Hospital, Boston, MA. Dr. van Ballegoij is currently at the Department of Neurology, Zaans Medisch Centrum, Zaandam.

Nicholas A Tritos (NA)

From the Department of Pediatric Neurology/Emma Children's Hospital (M.E., W.J.C.B., I.C.H.), Amsterdam UMC, Amsterdam Leukodystrophy Center, University of Amsterdam, the Netherlands; Division of Child Neurology (E.J.M.), Department of Pediatrics, Weill Cornell Medicine/NewYork-Presbyterian Hospital, NY; Department of Neurology & Pediatrics/Lucile Packard Children's Hospital (K.P.V.H.), Stanford University School of Medicine, Palo Alto, CA 4. Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Germany; Unit of Rare Neurodegenerative and Neurometabolic Diseases (E.S.), Fondazione IRCCS Istituto Neurologico C. Besta, Milano, Italy; Department of Pediatric Endocrinology/Emma Children's Hospital (A.S.P.T.), Amsterdam UMC, University of Amsterdam, the Netherlands; AP-HP (F.M.), Department of Medical Genetics, Reference Center for Adult Neurometabolic Diseases and Leukodystrophies, and INSERM U 1127, CNRS UMR 7225, Paris Brain Institute, La Pitié-Salpêtrière University Hospital, Paris, France; Department of Pediatric Neurology/Hôpital Bicêtre Paris Sud (C.S.), France, Reference Center for Children Leukodystrophies Inserm U1127, ICM-Hôpital Pitié Salpêtrière, Paris, France; Division of Pediatric Endocrinology and Diabetes (M.O.R.), Children's Hospital at Montefiore, Albert Einstein College of Medicine of Medicine, Bronx, NY; Neuroendocrine Unit (N.A.T.), Massachusetts General Hospital, Boston, MA; Harvard Medical School (N.A.T.), Boston, MA; Division of Pediatric Endocrinology (A.H.), Department of Pediatrics, Massachusetts General Hospital, Boston, MA, and Harvard Medical School (A.H.), Boston, MA; Charles Dent Metabolic Unit (R.H.L.), National Hospital for Neurology and Neurosurgery, London, United Kingdom; Metabolic Medicine (J.D.), Great Ormond Street Hospital for Children, London United Kingdom; Department of Genetic Medicine (G.V.R.), Johns Hopkins, Baltimore, MD; Division of Pediatric Blood and Marrow Transplantation & Cellular Therapy (T.L., P.J.O.), University of Minnesota, Minneapolis; Pediatric Oncology (J.-S.K.), Hematology, Hemostaseology, University Hospital Leipzig, Germany; Pediatric Blood and Bone Marrow Transplantation (C.A.L.), Princess Maxima Center Utrecht, the Netherlands; Department of Pediatrics (C.A.L.), Wilhemina Children's Hospital, UMC Utrecht, Utrecht University, the Netherlands; Director of Pediatric Neuroimaging (P.C.), Lenox Hill Radiology and Medical Imaging Associates, New York, NY; Moser Center for Leukodystrophies (B.R.T., A.F.), Kennedy Krieger Institute, Johns Hopkins Medical Institutions, Baltimore, MD; Department of Neurogenetics (A.B.M.), Kennedy Krieger Institute, Baltimore, MD; Laboratory Genetic Metabolic Diseases (F.M.V., S.F., S.K.), Department of Clinical Chemistry and Pediatrics, Amsterdam UMC, Amsterdam Gastroenterology Endocrinology Metabolism, University of Amsterdam, the Netherlands; and Department of Neurology (F.S.E.), Massachusetts General Hospital, Boston, MA. Dr. van Ballegoij is currently at the Department of Neurology, Zaans Medisch Centrum, Zaandam.

Alyssa Halper (A)

From the Department of Pediatric Neurology/Emma Children's Hospital (M.E., W.J.C.B., I.C.H.), Amsterdam UMC, Amsterdam Leukodystrophy Center, University of Amsterdam, the Netherlands; Division of Child Neurology (E.J.M.), Department of Pediatrics, Weill Cornell Medicine/NewYork-Presbyterian Hospital, NY; Department of Neurology & Pediatrics/Lucile Packard Children's Hospital (K.P.V.H.), Stanford University School of Medicine, Palo Alto, CA 4. Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Germany; Unit of Rare Neurodegenerative and Neurometabolic Diseases (E.S.), Fondazione IRCCS Istituto Neurologico C. Besta, Milano, Italy; Department of Pediatric Endocrinology/Emma Children's Hospital (A.S.P.T.), Amsterdam UMC, University of Amsterdam, the Netherlands; AP-HP (F.M.), Department of Medical Genetics, Reference Center for Adult Neurometabolic Diseases and Leukodystrophies, and INSERM U 1127, CNRS UMR 7225, Paris Brain Institute, La Pitié-Salpêtrière University Hospital, Paris, France; Department of Pediatric Neurology/Hôpital Bicêtre Paris Sud (C.S.), France, Reference Center for Children Leukodystrophies Inserm U1127, ICM-Hôpital Pitié Salpêtrière, Paris, France; Division of Pediatric Endocrinology and Diabetes (M.O.R.), Children's Hospital at Montefiore, Albert Einstein College of Medicine of Medicine, Bronx, NY; Neuroendocrine Unit (N.A.T.), Massachusetts General Hospital, Boston, MA; Harvard Medical School (N.A.T.), Boston, MA; Division of Pediatric Endocrinology (A.H.), Department of Pediatrics, Massachusetts General Hospital, Boston, MA, and Harvard Medical School (A.H.), Boston, MA; Charles Dent Metabolic Unit (R.H.L.), National Hospital for Neurology and Neurosurgery, London, United Kingdom; Metabolic Medicine (J.D.), Great Ormond Street Hospital for Children, London United Kingdom; Department of Genetic Medicine (G.V.R.), Johns Hopkins, Baltimore, MD; Division of Pediatric Blood and Marrow Transplantation & Cellular Therapy (T.L., P.J.O.), University of Minnesota, Minneapolis; Pediatric Oncology (J.-S.K.), Hematology, Hemostaseology, University Hospital Leipzig, Germany; Pediatric Blood and Bone Marrow Transplantation (C.A.L.), Princess Maxima Center Utrecht, the Netherlands; Department of Pediatrics (C.A.L.), Wilhemina Children's Hospital, UMC Utrecht, Utrecht University, the Netherlands; Director of Pediatric Neuroimaging (P.C.), Lenox Hill Radiology and Medical Imaging Associates, New York, NY; Moser Center for Leukodystrophies (B.R.T., A.F.), Kennedy Krieger Institute, Johns Hopkins Medical Institutions, Baltimore, MD; Department of Neurogenetics (A.B.M.), Kennedy Krieger Institute, Baltimore, MD; Laboratory Genetic Metabolic Diseases (F.M.V., S.F., S.K.), Department of Clinical Chemistry and Pediatrics, Amsterdam UMC, Amsterdam Gastroenterology Endocrinology Metabolism, University of Amsterdam, the Netherlands; and Department of Neurology (F.S.E.), Massachusetts General Hospital, Boston, MA. Dr. van Ballegoij is currently at the Department of Neurology, Zaans Medisch Centrum, Zaandam.

Robin H Lachmann (RH)

From the Department of Pediatric Neurology/Emma Children's Hospital (M.E., W.J.C.B., I.C.H.), Amsterdam UMC, Amsterdam Leukodystrophy Center, University of Amsterdam, the Netherlands; Division of Child Neurology (E.J.M.), Department of Pediatrics, Weill Cornell Medicine/NewYork-Presbyterian Hospital, NY; Department of Neurology & Pediatrics/Lucile Packard Children's Hospital (K.P.V.H.), Stanford University School of Medicine, Palo Alto, CA 4. Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Germany; Unit of Rare Neurodegenerative and Neurometabolic Diseases (E.S.), Fondazione IRCCS Istituto Neurologico C. Besta, Milano, Italy; Department of Pediatric Endocrinology/Emma Children's Hospital (A.S.P.T.), Amsterdam UMC, University of Amsterdam, the Netherlands; AP-HP (F.M.), Department of Medical Genetics, Reference Center for Adult Neurometabolic Diseases and Leukodystrophies, and INSERM U 1127, CNRS UMR 7225, Paris Brain Institute, La Pitié-Salpêtrière University Hospital, Paris, France; Department of Pediatric Neurology/Hôpital Bicêtre Paris Sud (C.S.), France, Reference Center for Children Leukodystrophies Inserm U1127, ICM-Hôpital Pitié Salpêtrière, Paris, France; Division of Pediatric Endocrinology and Diabetes (M.O.R.), Children's Hospital at Montefiore, Albert Einstein College of Medicine of Medicine, Bronx, NY; Neuroendocrine Unit (N.A.T.), Massachusetts General Hospital, Boston, MA; Harvard Medical School (N.A.T.), Boston, MA; Division of Pediatric Endocrinology (A.H.), Department of Pediatrics, Massachusetts General Hospital, Boston, MA, and Harvard Medical School (A.H.), Boston, MA; Charles Dent Metabolic Unit (R.H.L.), National Hospital for Neurology and Neurosurgery, London, United Kingdom; Metabolic Medicine (J.D.), Great Ormond Street Hospital for Children, London United Kingdom; Department of Genetic Medicine (G.V.R.), Johns Hopkins, Baltimore, MD; Division of Pediatric Blood and Marrow Transplantation & Cellular Therapy (T.L., P.J.O.), University of Minnesota, Minneapolis; Pediatric Oncology (J.-S.K.), Hematology, Hemostaseology, University Hospital Leipzig, Germany; Pediatric Blood and Bone Marrow Transplantation (C.A.L.), Princess Maxima Center Utrecht, the Netherlands; Department of Pediatrics (C.A.L.), Wilhemina Children's Hospital, UMC Utrecht, Utrecht University, the Netherlands; Director of Pediatric Neuroimaging (P.C.), Lenox Hill Radiology and Medical Imaging Associates, New York, NY; Moser Center for Leukodystrophies (B.R.T., A.F.), Kennedy Krieger Institute, Johns Hopkins Medical Institutions, Baltimore, MD; Department of Neurogenetics (A.B.M.), Kennedy Krieger Institute, Baltimore, MD; Laboratory Genetic Metabolic Diseases (F.M.V., S.F., S.K.), Department of Clinical Chemistry and Pediatrics, Amsterdam UMC, Amsterdam Gastroenterology Endocrinology Metabolism, University of Amsterdam, the Netherlands; and Department of Neurology (F.S.E.), Massachusetts General Hospital, Boston, MA. Dr. van Ballegoij is currently at the Department of Neurology, Zaans Medisch Centrum, Zaandam.

James Davison (J)

From the Department of Pediatric Neurology/Emma Children's Hospital (M.E., W.J.C.B., I.C.H.), Amsterdam UMC, Amsterdam Leukodystrophy Center, University of Amsterdam, the Netherlands; Division of Child Neurology (E.J.M.), Department of Pediatrics, Weill Cornell Medicine/NewYork-Presbyterian Hospital, NY; Department of Neurology & Pediatrics/Lucile Packard Children's Hospital (K.P.V.H.), Stanford University School of Medicine, Palo Alto, CA 4. Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Germany; Unit of Rare Neurodegenerative and Neurometabolic Diseases (E.S.), Fondazione IRCCS Istituto Neurologico C. Besta, Milano, Italy; Department of Pediatric Endocrinology/Emma Children's Hospital (A.S.P.T.), Amsterdam UMC, University of Amsterdam, the Netherlands; AP-HP (F.M.), Department of Medical Genetics, Reference Center for Adult Neurometabolic Diseases and Leukodystrophies, and INSERM U 1127, CNRS UMR 7225, Paris Brain Institute, La Pitié-Salpêtrière University Hospital, Paris, France; Department of Pediatric Neurology/Hôpital Bicêtre Paris Sud (C.S.), France, Reference Center for Children Leukodystrophies Inserm U1127, ICM-Hôpital Pitié Salpêtrière, Paris, France; Division of Pediatric Endocrinology and Diabetes (M.O.R.), Children's Hospital at Montefiore, Albert Einstein College of Medicine of Medicine, Bronx, NY; Neuroendocrine Unit (N.A.T.), Massachusetts General Hospital, Boston, MA; Harvard Medical School (N.A.T.), Boston, MA; Division of Pediatric Endocrinology (A.H.), Department of Pediatrics, Massachusetts General Hospital, Boston, MA, and Harvard Medical School (A.H.), Boston, MA; Charles Dent Metabolic Unit (R.H.L.), National Hospital for Neurology and Neurosurgery, London, United Kingdom; Metabolic Medicine (J.D.), Great Ormond Street Hospital for Children, London United Kingdom; Department of Genetic Medicine (G.V.R.), Johns Hopkins, Baltimore, MD; Division of Pediatric Blood and Marrow Transplantation & Cellular Therapy (T.L., P.J.O.), University of Minnesota, Minneapolis; Pediatric Oncology (J.-S.K.), Hematology, Hemostaseology, University Hospital Leipzig, Germany; Pediatric Blood and Bone Marrow Transplantation (C.A.L.), Princess Maxima Center Utrecht, the Netherlands; Department of Pediatrics (C.A.L.), Wilhemina Children's Hospital, UMC Utrecht, Utrecht University, the Netherlands; Director of Pediatric Neuroimaging (P.C.), Lenox Hill Radiology and Medical Imaging Associates, New York, NY; Moser Center for Leukodystrophies (B.R.T., A.F.), Kennedy Krieger Institute, Johns Hopkins Medical Institutions, Baltimore, MD; Department of Neurogenetics (A.B.M.), Kennedy Krieger Institute, Baltimore, MD; Laboratory Genetic Metabolic Diseases (F.M.V., S.F., S.K.), Department of Clinical Chemistry and Pediatrics, Amsterdam UMC, Amsterdam Gastroenterology Endocrinology Metabolism, University of Amsterdam, the Netherlands; and Department of Neurology (F.S.E.), Massachusetts General Hospital, Boston, MA. Dr. van Ballegoij is currently at the Department of Neurology, Zaans Medisch Centrum, Zaandam.

Gerald V Raymond (GV)

From the Department of Pediatric Neurology/Emma Children's Hospital (M.E., W.J.C.B., I.C.H.), Amsterdam UMC, Amsterdam Leukodystrophy Center, University of Amsterdam, the Netherlands; Division of Child Neurology (E.J.M.), Department of Pediatrics, Weill Cornell Medicine/NewYork-Presbyterian Hospital, NY; Department of Neurology & Pediatrics/Lucile Packard Children's Hospital (K.P.V.H.), Stanford University School of Medicine, Palo Alto, CA 4. Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Germany; Unit of Rare Neurodegenerative and Neurometabolic Diseases (E.S.), Fondazione IRCCS Istituto Neurologico C. Besta, Milano, Italy; Department of Pediatric Endocrinology/Emma Children's Hospital (A.S.P.T.), Amsterdam UMC, University of Amsterdam, the Netherlands; AP-HP (F.M.), Department of Medical Genetics, Reference Center for Adult Neurometabolic Diseases and Leukodystrophies, and INSERM U 1127, CNRS UMR 7225, Paris Brain Institute, La Pitié-Salpêtrière University Hospital, Paris, France; Department of Pediatric Neurology/Hôpital Bicêtre Paris Sud (C.S.), France, Reference Center for Children Leukodystrophies Inserm U1127, ICM-Hôpital Pitié Salpêtrière, Paris, France; Division of Pediatric Endocrinology and Diabetes (M.O.R.), Children's Hospital at Montefiore, Albert Einstein College of Medicine of Medicine, Bronx, NY; Neuroendocrine Unit (N.A.T.), Massachusetts General Hospital, Boston, MA; Harvard Medical School (N.A.T.), Boston, MA; Division of Pediatric Endocrinology (A.H.), Department of Pediatrics, Massachusetts General Hospital, Boston, MA, and Harvard Medical School (A.H.), Boston, MA; Charles Dent Metabolic Unit (R.H.L.), National Hospital for Neurology and Neurosurgery, London, United Kingdom; Metabolic Medicine (J.D.), Great Ormond Street Hospital for Children, London United Kingdom; Department of Genetic Medicine (G.V.R.), Johns Hopkins, Baltimore, MD; Division of Pediatric Blood and Marrow Transplantation & Cellular Therapy (T.L., P.J.O.), University of Minnesota, Minneapolis; Pediatric Oncology (J.-S.K.), Hematology, Hemostaseology, University Hospital Leipzig, Germany; Pediatric Blood and Bone Marrow Transplantation (C.A.L.), Princess Maxima Center Utrecht, the Netherlands; Department of Pediatrics (C.A.L.), Wilhemina Children's Hospital, UMC Utrecht, Utrecht University, the Netherlands; Director of Pediatric Neuroimaging (P.C.), Lenox Hill Radiology and Medical Imaging Associates, New York, NY; Moser Center for Leukodystrophies (B.R.T., A.F.), Kennedy Krieger Institute, Johns Hopkins Medical Institutions, Baltimore, MD; Department of Neurogenetics (A.B.M.), Kennedy Krieger Institute, Baltimore, MD; Laboratory Genetic Metabolic Diseases (F.M.V., S.F., S.K.), Department of Clinical Chemistry and Pediatrics, Amsterdam UMC, Amsterdam Gastroenterology Endocrinology Metabolism, University of Amsterdam, the Netherlands; and Department of Neurology (F.S.E.), Massachusetts General Hospital, Boston, MA. Dr. van Ballegoij is currently at the Department of Neurology, Zaans Medisch Centrum, Zaandam.

Troy C Lund (TC)

From the Department of Pediatric Neurology/Emma Children's Hospital (M.E., W.J.C.B., I.C.H.), Amsterdam UMC, Amsterdam Leukodystrophy Center, University of Amsterdam, the Netherlands; Division of Child Neurology (E.J.M.), Department of Pediatrics, Weill Cornell Medicine/NewYork-Presbyterian Hospital, NY; Department of Neurology & Pediatrics/Lucile Packard Children's Hospital (K.P.V.H.), Stanford University School of Medicine, Palo Alto, CA 4. Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Germany; Unit of Rare Neurodegenerative and Neurometabolic Diseases (E.S.), Fondazione IRCCS Istituto Neurologico C. Besta, Milano, Italy; Department of Pediatric Endocrinology/Emma Children's Hospital (A.S.P.T.), Amsterdam UMC, University of Amsterdam, the Netherlands; AP-HP (F.M.), Department of Medical Genetics, Reference Center for Adult Neurometabolic Diseases and Leukodystrophies, and INSERM U 1127, CNRS UMR 7225, Paris Brain Institute, La Pitié-Salpêtrière University Hospital, Paris, France; Department of Pediatric Neurology/Hôpital Bicêtre Paris Sud (C.S.), France, Reference Center for Children Leukodystrophies Inserm U1127, ICM-Hôpital Pitié Salpêtrière, Paris, France; Division of Pediatric Endocrinology and Diabetes (M.O.R.), Children's Hospital at Montefiore, Albert Einstein College of Medicine of Medicine, Bronx, NY; Neuroendocrine Unit (N.A.T.), Massachusetts General Hospital, Boston, MA; Harvard Medical School (N.A.T.), Boston, MA; Division of Pediatric Endocrinology (A.H.), Department of Pediatrics, Massachusetts General Hospital, Boston, MA, and Harvard Medical School (A.H.), Boston, MA; Charles Dent Metabolic Unit (R.H.L.), National Hospital for Neurology and Neurosurgery, London, United Kingdom; Metabolic Medicine (J.D.), Great Ormond Street Hospital for Children, London United Kingdom; Department of Genetic Medicine (G.V.R.), Johns Hopkins, Baltimore, MD; Division of Pediatric Blood and Marrow Transplantation & Cellular Therapy (T.L., P.J.O.), University of Minnesota, Minneapolis; Pediatric Oncology (J.-S.K.), Hematology, Hemostaseology, University Hospital Leipzig, Germany; Pediatric Blood and Bone Marrow Transplantation (C.A.L.), Princess Maxima Center Utrecht, the Netherlands; Department of Pediatrics (C.A.L.), Wilhemina Children's Hospital, UMC Utrecht, Utrecht University, the Netherlands; Director of Pediatric Neuroimaging (P.C.), Lenox Hill Radiology and Medical Imaging Associates, New York, NY; Moser Center for Leukodystrophies (B.R.T., A.F.), Kennedy Krieger Institute, Johns Hopkins Medical Institutions, Baltimore, MD; Department of Neurogenetics (A.B.M.), Kennedy Krieger Institute, Baltimore, MD; Laboratory Genetic Metabolic Diseases (F.M.V., S.F., S.K.), Department of Clinical Chemistry and Pediatrics, Amsterdam UMC, Amsterdam Gastroenterology Endocrinology Metabolism, University of Amsterdam, the Netherlands; and Department of Neurology (F.S.E.), Massachusetts General Hospital, Boston, MA. Dr. van Ballegoij is currently at the Department of Neurology, Zaans Medisch Centrum, Zaandam.

Paul J Orchard (PJ)

From the Department of Pediatric Neurology/Emma Children's Hospital (M.E., W.J.C.B., I.C.H.), Amsterdam UMC, Amsterdam Leukodystrophy Center, University of Amsterdam, the Netherlands; Division of Child Neurology (E.J.M.), Department of Pediatrics, Weill Cornell Medicine/NewYork-Presbyterian Hospital, NY; Department of Neurology & Pediatrics/Lucile Packard Children's Hospital (K.P.V.H.), Stanford University School of Medicine, Palo Alto, CA 4. Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Germany; Unit of Rare Neurodegenerative and Neurometabolic Diseases (E.S.), Fondazione IRCCS Istituto Neurologico C. Besta, Milano, Italy; Department of Pediatric Endocrinology/Emma Children's Hospital (A.S.P.T.), Amsterdam UMC, University of Amsterdam, the Netherlands; AP-HP (F.M.), Department of Medical Genetics, Reference Center for Adult Neurometabolic Diseases and Leukodystrophies, and INSERM U 1127, CNRS UMR 7225, Paris Brain Institute, La Pitié-Salpêtrière University Hospital, Paris, France; Department of Pediatric Neurology/Hôpital Bicêtre Paris Sud (C.S.), France, Reference Center for Children Leukodystrophies Inserm U1127, ICM-Hôpital Pitié Salpêtrière, Paris, France; Division of Pediatric Endocrinology and Diabetes (M.O.R.), Children's Hospital at Montefiore, Albert Einstein College of Medicine of Medicine, Bronx, NY; Neuroendocrine Unit (N.A.T.), Massachusetts General Hospital, Boston, MA; Harvard Medical School (N.A.T.), Boston, MA; Division of Pediatric Endocrinology (A.H.), Department of Pediatrics, Massachusetts General Hospital, Boston, MA, and Harvard Medical School (A.H.), Boston, MA; Charles Dent Metabolic Unit (R.H.L.), National Hospital for Neurology and Neurosurgery, London, United Kingdom; Metabolic Medicine (J.D.), Great Ormond Street Hospital for Children, London United Kingdom; Department of Genetic Medicine (G.V.R.), Johns Hopkins, Baltimore, MD; Division of Pediatric Blood and Marrow Transplantation & Cellular Therapy (T.L., P.J.O.), University of Minnesota, Minneapolis; Pediatric Oncology (J.-S.K.), Hematology, Hemostaseology, University Hospital Leipzig, Germany; Pediatric Blood and Bone Marrow Transplantation (C.A.L.), Princess Maxima Center Utrecht, the Netherlands; Department of Pediatrics (C.A.L.), Wilhemina Children's Hospital, UMC Utrecht, Utrecht University, the Netherlands; Director of Pediatric Neuroimaging (P.C.), Lenox Hill Radiology and Medical Imaging Associates, New York, NY; Moser Center for Leukodystrophies (B.R.T., A.F.), Kennedy Krieger Institute, Johns Hopkins Medical Institutions, Baltimore, MD; Department of Neurogenetics (A.B.M.), Kennedy Krieger Institute, Baltimore, MD; Laboratory Genetic Metabolic Diseases (F.M.V., S.F., S.K.), Department of Clinical Chemistry and Pediatrics, Amsterdam UMC, Amsterdam Gastroenterology Endocrinology Metabolism, University of Amsterdam, the Netherlands; and Department of Neurology (F.S.E.), Massachusetts General Hospital, Boston, MA. Dr. van Ballegoij is currently at the Department of Neurology, Zaans Medisch Centrum, Zaandam.

Joern-Sven Kuehl (JS)

From the Department of Pediatric Neurology/Emma Children's Hospital (M.E., W.J.C.B., I.C.H.), Amsterdam UMC, Amsterdam Leukodystrophy Center, University of Amsterdam, the Netherlands; Division of Child Neurology (E.J.M.), Department of Pediatrics, Weill Cornell Medicine/NewYork-Presbyterian Hospital, NY; Department of Neurology & Pediatrics/Lucile Packard Children's Hospital (K.P.V.H.), Stanford University School of Medicine, Palo Alto, CA 4. Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Germany; Unit of Rare Neurodegenerative and Neurometabolic Diseases (E.S.), Fondazione IRCCS Istituto Neurologico C. Besta, Milano, Italy; Department of Pediatric Endocrinology/Emma Children's Hospital (A.S.P.T.), Amsterdam UMC, University of Amsterdam, the Netherlands; AP-HP (F.M.), Department of Medical Genetics, Reference Center for Adult Neurometabolic Diseases and Leukodystrophies, and INSERM U 1127, CNRS UMR 7225, Paris Brain Institute, La Pitié-Salpêtrière University Hospital, Paris, France; Department of Pediatric Neurology/Hôpital Bicêtre Paris Sud (C.S.), France, Reference Center for Children Leukodystrophies Inserm U1127, ICM-Hôpital Pitié Salpêtrière, Paris, France; Division of Pediatric Endocrinology and Diabetes (M.O.R.), Children's Hospital at Montefiore, Albert Einstein College of Medicine of Medicine, Bronx, NY; Neuroendocrine Unit (N.A.T.), Massachusetts General Hospital, Boston, MA; Harvard Medical School (N.A.T.), Boston, MA; Division of Pediatric Endocrinology (A.H.), Department of Pediatrics, Massachusetts General Hospital, Boston, MA, and Harvard Medical School (A.H.), Boston, MA; Charles Dent Metabolic Unit (R.H.L.), National Hospital for Neurology and Neurosurgery, London, United Kingdom; Metabolic Medicine (J.D.), Great Ormond Street Hospital for Children, London United Kingdom; Department of Genetic Medicine (G.V.R.), Johns Hopkins, Baltimore, MD; Division of Pediatric Blood and Marrow Transplantation & Cellular Therapy (T.L., P.J.O.), University of Minnesota, Minneapolis; Pediatric Oncology (J.-S.K.), Hematology, Hemostaseology, University Hospital Leipzig, Germany; Pediatric Blood and Bone Marrow Transplantation (C.A.L.), Princess Maxima Center Utrecht, the Netherlands; Department of Pediatrics (C.A.L.), Wilhemina Children's Hospital, UMC Utrecht, Utrecht University, the Netherlands; Director of Pediatric Neuroimaging (P.C.), Lenox Hill Radiology and Medical Imaging Associates, New York, NY; Moser Center for Leukodystrophies (B.R.T., A.F.), Kennedy Krieger Institute, Johns Hopkins Medical Institutions, Baltimore, MD; Department of Neurogenetics (A.B.M.), Kennedy Krieger Institute, Baltimore, MD; Laboratory Genetic Metabolic Diseases (F.M.V., S.F., S.K.), Department of Clinical Chemistry and Pediatrics, Amsterdam UMC, Amsterdam Gastroenterology Endocrinology Metabolism, University of Amsterdam, the Netherlands; and Department of Neurology (F.S.E.), Massachusetts General Hospital, Boston, MA. Dr. van Ballegoij is currently at the Department of Neurology, Zaans Medisch Centrum, Zaandam.

Caroline A Lindemans (CA)

From the Department of Pediatric Neurology/Emma Children's Hospital (M.E., W.J.C.B., I.C.H.), Amsterdam UMC, Amsterdam Leukodystrophy Center, University of Amsterdam, the Netherlands; Division of Child Neurology (E.J.M.), Department of Pediatrics, Weill Cornell Medicine/NewYork-Presbyterian Hospital, NY; Department of Neurology & Pediatrics/Lucile Packard Children's Hospital (K.P.V.H.), Stanford University School of Medicine, Palo Alto, CA 4. Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Germany; Unit of Rare Neurodegenerative and Neurometabolic Diseases (E.S.), Fondazione IRCCS Istituto Neurologico C. Besta, Milano, Italy; Department of Pediatric Endocrinology/Emma Children's Hospital (A.S.P.T.), Amsterdam UMC, University of Amsterdam, the Netherlands; AP-HP (F.M.), Department of Medical Genetics, Reference Center for Adult Neurometabolic Diseases and Leukodystrophies, and INSERM U 1127, CNRS UMR 7225, Paris Brain Institute, La Pitié-Salpêtrière University Hospital, Paris, France; Department of Pediatric Neurology/Hôpital Bicêtre Paris Sud (C.S.), France, Reference Center for Children Leukodystrophies Inserm U1127, ICM-Hôpital Pitié Salpêtrière, Paris, France; Division of Pediatric Endocrinology and Diabetes (M.O.R.), Children's Hospital at Montefiore, Albert Einstein College of Medicine of Medicine, Bronx, NY; Neuroendocrine Unit (N.A.T.), Massachusetts General Hospital, Boston, MA; Harvard Medical School (N.A.T.), Boston, MA; Division of Pediatric Endocrinology (A.H.), Department of Pediatrics, Massachusetts General Hospital, Boston, MA, and Harvard Medical School (A.H.), Boston, MA; Charles Dent Metabolic Unit (R.H.L.), National Hospital for Neurology and Neurosurgery, London, United Kingdom; Metabolic Medicine (J.D.), Great Ormond Street Hospital for Children, London United Kingdom; Department of Genetic Medicine (G.V.R.), Johns Hopkins, Baltimore, MD; Division of Pediatric Blood and Marrow Transplantation & Cellular Therapy (T.L., P.J.O.), University of Minnesota, Minneapolis; Pediatric Oncology (J.-S.K.), Hematology, Hemostaseology, University Hospital Leipzig, Germany; Pediatric Blood and Bone Marrow Transplantation (C.A.L.), Princess Maxima Center Utrecht, the Netherlands; Department of Pediatrics (C.A.L.), Wilhemina Children's Hospital, UMC Utrecht, Utrecht University, the Netherlands; Director of Pediatric Neuroimaging (P.C.), Lenox Hill Radiology and Medical Imaging Associates, New York, NY; Moser Center for Leukodystrophies (B.R.T., A.F.), Kennedy Krieger Institute, Johns Hopkins Medical Institutions, Baltimore, MD; Department of Neurogenetics (A.B.M.), Kennedy Krieger Institute, Baltimore, MD; Laboratory Genetic Metabolic Diseases (F.M.V., S.F., S.K.), Department of Clinical Chemistry and Pediatrics, Amsterdam UMC, Amsterdam Gastroenterology Endocrinology Metabolism, University of Amsterdam, the Netherlands; and Department of Neurology (F.S.E.), Massachusetts General Hospital, Boston, MA. Dr. van Ballegoij is currently at the Department of Neurology, Zaans Medisch Centrum, Zaandam.

Paul Caruso (P)

From the Department of Pediatric Neurology/Emma Children's Hospital (M.E., W.J.C.B., I.C.H.), Amsterdam UMC, Amsterdam Leukodystrophy Center, University of Amsterdam, the Netherlands; Division of Child Neurology (E.J.M.), Department of Pediatrics, Weill Cornell Medicine/NewYork-Presbyterian Hospital, NY; Department of Neurology & Pediatrics/Lucile Packard Children's Hospital (K.P.V.H.), Stanford University School of Medicine, Palo Alto, CA 4. Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Germany; Unit of Rare Neurodegenerative and Neurometabolic Diseases (E.S.), Fondazione IRCCS Istituto Neurologico C. Besta, Milano, Italy; Department of Pediatric Endocrinology/Emma Children's Hospital (A.S.P.T.), Amsterdam UMC, University of Amsterdam, the Netherlands; AP-HP (F.M.), Department of Medical Genetics, Reference Center for Adult Neurometabolic Diseases and Leukodystrophies, and INSERM U 1127, CNRS UMR 7225, Paris Brain Institute, La Pitié-Salpêtrière University Hospital, Paris, France; Department of Pediatric Neurology/Hôpital Bicêtre Paris Sud (C.S.), France, Reference Center for Children Leukodystrophies Inserm U1127, ICM-Hôpital Pitié Salpêtrière, Paris, France; Division of Pediatric Endocrinology and Diabetes (M.O.R.), Children's Hospital at Montefiore, Albert Einstein College of Medicine of Medicine, Bronx, NY; Neuroendocrine Unit (N.A.T.), Massachusetts General Hospital, Boston, MA; Harvard Medical School (N.A.T.), Boston, MA; Division of Pediatric Endocrinology (A.H.), Department of Pediatrics, Massachusetts General Hospital, Boston, MA, and Harvard Medical School (A.H.), Boston, MA; Charles Dent Metabolic Unit (R.H.L.), National Hospital for Neurology and Neurosurgery, London, United Kingdom; Metabolic Medicine (J.D.), Great Ormond Street Hospital for Children, London United Kingdom; Department of Genetic Medicine (G.V.R.), Johns Hopkins, Baltimore, MD; Division of Pediatric Blood and Marrow Transplantation & Cellular Therapy (T.L., P.J.O.), University of Minnesota, Minneapolis; Pediatric Oncology (J.-S.K.), Hematology, Hemostaseology, University Hospital Leipzig, Germany; Pediatric Blood and Bone Marrow Transplantation (C.A.L.), Princess Maxima Center Utrecht, the Netherlands; Department of Pediatrics (C.A.L.), Wilhemina Children's Hospital, UMC Utrecht, Utrecht University, the Netherlands; Director of Pediatric Neuroimaging (P.C.), Lenox Hill Radiology and Medical Imaging Associates, New York, NY; Moser Center for Leukodystrophies (B.R.T., A.F.), Kennedy Krieger Institute, Johns Hopkins Medical Institutions, Baltimore, MD; Department of Neurogenetics (A.B.M.), Kennedy Krieger Institute, Baltimore, MD; Laboratory Genetic Metabolic Diseases (F.M.V., S.F., S.K.), Department of Clinical Chemistry and Pediatrics, Amsterdam UMC, Amsterdam Gastroenterology Endocrinology Metabolism, University of Amsterdam, the Netherlands; and Department of Neurology (F.S.E.), Massachusetts General Hospital, Boston, MA. Dr. van Ballegoij is currently at the Department of Neurology, Zaans Medisch Centrum, Zaandam.

Bela Rui Turk (BR)

From the Department of Pediatric Neurology/Emma Children's Hospital (M.E., W.J.C.B., I.C.H.), Amsterdam UMC, Amsterdam Leukodystrophy Center, University of Amsterdam, the Netherlands; Division of Child Neurology (E.J.M.), Department of Pediatrics, Weill Cornell Medicine/NewYork-Presbyterian Hospital, NY; Department of Neurology & Pediatrics/Lucile Packard Children's Hospital (K.P.V.H.), Stanford University School of Medicine, Palo Alto, CA 4. Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Germany; Unit of Rare Neurodegenerative and Neurometabolic Diseases (E.S.), Fondazione IRCCS Istituto Neurologico C. Besta, Milano, Italy; Department of Pediatric Endocrinology/Emma Children's Hospital (A.S.P.T.), Amsterdam UMC, University of Amsterdam, the Netherlands; AP-HP (F.M.), Department of Medical Genetics, Reference Center for Adult Neurometabolic Diseases and Leukodystrophies, and INSERM U 1127, CNRS UMR 7225, Paris Brain Institute, La Pitié-Salpêtrière University Hospital, Paris, France; Department of Pediatric Neurology/Hôpital Bicêtre Paris Sud (C.S.), France, Reference Center for Children Leukodystrophies Inserm U1127, ICM-Hôpital Pitié Salpêtrière, Paris, France; Division of Pediatric Endocrinology and Diabetes (M.O.R.), Children's Hospital at Montefiore, Albert Einstein College of Medicine of Medicine, Bronx, NY; Neuroendocrine Unit (N.A.T.), Massachusetts General Hospital, Boston, MA; Harvard Medical School (N.A.T.), Boston, MA; Division of Pediatric Endocrinology (A.H.), Department of Pediatrics, Massachusetts General Hospital, Boston, MA, and Harvard Medical School (A.H.), Boston, MA; Charles Dent Metabolic Unit (R.H.L.), National Hospital for Neurology and Neurosurgery, London, United Kingdom; Metabolic Medicine (J.D.), Great Ormond Street Hospital for Children, London United Kingdom; Department of Genetic Medicine (G.V.R.), Johns Hopkins, Baltimore, MD; Division of Pediatric Blood and Marrow Transplantation & Cellular Therapy (T.L., P.J.O.), University of Minnesota, Minneapolis; Pediatric Oncology (J.-S.K.), Hematology, Hemostaseology, University Hospital Leipzig, Germany; Pediatric Blood and Bone Marrow Transplantation (C.A.L.), Princess Maxima Center Utrecht, the Netherlands; Department of Pediatrics (C.A.L.), Wilhemina Children's Hospital, UMC Utrecht, Utrecht University, the Netherlands; Director of Pediatric Neuroimaging (P.C.), Lenox Hill Radiology and Medical Imaging Associates, New York, NY; Moser Center for Leukodystrophies (B.R.T., A.F.), Kennedy Krieger Institute, Johns Hopkins Medical Institutions, Baltimore, MD; Department of Neurogenetics (A.B.M.), Kennedy Krieger Institute, Baltimore, MD; Laboratory Genetic Metabolic Diseases (F.M.V., S.F., S.K.), Department of Clinical Chemistry and Pediatrics, Amsterdam UMC, Amsterdam Gastroenterology Endocrinology Metabolism, University of Amsterdam, the Netherlands; and Department of Neurology (F.S.E.), Massachusetts General Hospital, Boston, MA. Dr. van Ballegoij is currently at the Department of Neurology, Zaans Medisch Centrum, Zaandam.

Ann B Moser (AB)

From the Department of Pediatric Neurology/Emma Children's Hospital (M.E., W.J.C.B., I.C.H.), Amsterdam UMC, Amsterdam Leukodystrophy Center, University of Amsterdam, the Netherlands; Division of Child Neurology (E.J.M.), Department of Pediatrics, Weill Cornell Medicine/NewYork-Presbyterian Hospital, NY; Department of Neurology & Pediatrics/Lucile Packard Children's Hospital (K.P.V.H.), Stanford University School of Medicine, Palo Alto, CA 4. Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Germany; Unit of Rare Neurodegenerative and Neurometabolic Diseases (E.S.), Fondazione IRCCS Istituto Neurologico C. Besta, Milano, Italy; Department of Pediatric Endocrinology/Emma Children's Hospital (A.S.P.T.), Amsterdam UMC, University of Amsterdam, the Netherlands; AP-HP (F.M.), Department of Medical Genetics, Reference Center for Adult Neurometabolic Diseases and Leukodystrophies, and INSERM U 1127, CNRS UMR 7225, Paris Brain Institute, La Pitié-Salpêtrière University Hospital, Paris, France; Department of Pediatric Neurology/Hôpital Bicêtre Paris Sud (C.S.), France, Reference Center for Children Leukodystrophies Inserm U1127, ICM-Hôpital Pitié Salpêtrière, Paris, France; Division of Pediatric Endocrinology and Diabetes (M.O.R.), Children's Hospital at Montefiore, Albert Einstein College of Medicine of Medicine, Bronx, NY; Neuroendocrine Unit (N.A.T.), Massachusetts General Hospital, Boston, MA; Harvard Medical School (N.A.T.), Boston, MA; Division of Pediatric Endocrinology (A.H.), Department of Pediatrics, Massachusetts General Hospital, Boston, MA, and Harvard Medical School (A.H.), Boston, MA; Charles Dent Metabolic Unit (R.H.L.), National Hospital for Neurology and Neurosurgery, London, United Kingdom; Metabolic Medicine (J.D.), Great Ormond Street Hospital for Children, London United Kingdom; Department of Genetic Medicine (G.V.R.), Johns Hopkins, Baltimore, MD; Division of Pediatric Blood and Marrow Transplantation & Cellular Therapy (T.L., P.J.O.), University of Minnesota, Minneapolis; Pediatric Oncology (J.-S.K.), Hematology, Hemostaseology, University Hospital Leipzig, Germany; Pediatric Blood and Bone Marrow Transplantation (C.A.L.), Princess Maxima Center Utrecht, the Netherlands; Department of Pediatrics (C.A.L.), Wilhemina Children's Hospital, UMC Utrecht, Utrecht University, the Netherlands; Director of Pediatric Neuroimaging (P.C.), Lenox Hill Radiology and Medical Imaging Associates, New York, NY; Moser Center for Leukodystrophies (B.R.T., A.F.), Kennedy Krieger Institute, Johns Hopkins Medical Institutions, Baltimore, MD; Department of Neurogenetics (A.B.M.), Kennedy Krieger Institute, Baltimore, MD; Laboratory Genetic Metabolic Diseases (F.M.V., S.F., S.K.), Department of Clinical Chemistry and Pediatrics, Amsterdam UMC, Amsterdam Gastroenterology Endocrinology Metabolism, University of Amsterdam, the Netherlands; and Department of Neurology (F.S.E.), Massachusetts General Hospital, Boston, MA. Dr. van Ballegoij is currently at the Department of Neurology, Zaans Medisch Centrum, Zaandam.

Frédéric M Vaz (FM)

From the Department of Pediatric Neurology/Emma Children's Hospital (M.E., W.J.C.B., I.C.H.), Amsterdam UMC, Amsterdam Leukodystrophy Center, University of Amsterdam, the Netherlands; Division of Child Neurology (E.J.M.), Department of Pediatrics, Weill Cornell Medicine/NewYork-Presbyterian Hospital, NY; Department of Neurology & Pediatrics/Lucile Packard Children's Hospital (K.P.V.H.), Stanford University School of Medicine, Palo Alto, CA 4. Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Germany; Unit of Rare Neurodegenerative and Neurometabolic Diseases (E.S.), Fondazione IRCCS Istituto Neurologico C. Besta, Milano, Italy; Department of Pediatric Endocrinology/Emma Children's Hospital (A.S.P.T.), Amsterdam UMC, University of Amsterdam, the Netherlands; AP-HP (F.M.), Department of Medical Genetics, Reference Center for Adult Neurometabolic Diseases and Leukodystrophies, and INSERM U 1127, CNRS UMR 7225, Paris Brain Institute, La Pitié-Salpêtrière University Hospital, Paris, France; Department of Pediatric Neurology/Hôpital Bicêtre Paris Sud (C.S.), France, Reference Center for Children Leukodystrophies Inserm U1127, ICM-Hôpital Pitié Salpêtrière, Paris, France; Division of Pediatric Endocrinology and Diabetes (M.O.R.), Children's Hospital at Montefiore, Albert Einstein College of Medicine of Medicine, Bronx, NY; Neuroendocrine Unit (N.A.T.), Massachusetts General Hospital, Boston, MA; Harvard Medical School (N.A.T.), Boston, MA; Division of Pediatric Endocrinology (A.H.), Department of Pediatrics, Massachusetts General Hospital, Boston, MA, and Harvard Medical School (A.H.), Boston, MA; Charles Dent Metabolic Unit (R.H.L.), National Hospital for Neurology and Neurosurgery, London, United Kingdom; Metabolic Medicine (J.D.), Great Ormond Street Hospital for Children, London United Kingdom; Department of Genetic Medicine (G.V.R.), Johns Hopkins, Baltimore, MD; Division of Pediatric Blood and Marrow Transplantation & Cellular Therapy (T.L., P.J.O.), University of Minnesota, Minneapolis; Pediatric Oncology (J.-S.K.), Hematology, Hemostaseology, University Hospital Leipzig, Germany; Pediatric Blood and Bone Marrow Transplantation (C.A.L.), Princess Maxima Center Utrecht, the Netherlands; Department of Pediatrics (C.A.L.), Wilhemina Children's Hospital, UMC Utrecht, Utrecht University, the Netherlands; Director of Pediatric Neuroimaging (P.C.), Lenox Hill Radiology and Medical Imaging Associates, New York, NY; Moser Center for Leukodystrophies (B.R.T., A.F.), Kennedy Krieger Institute, Johns Hopkins Medical Institutions, Baltimore, MD; Department of Neurogenetics (A.B.M.), Kennedy Krieger Institute, Baltimore, MD; Laboratory Genetic Metabolic Diseases (F.M.V., S.F., S.K.), Department of Clinical Chemistry and Pediatrics, Amsterdam UMC, Amsterdam Gastroenterology Endocrinology Metabolism, University of Amsterdam, the Netherlands; and Department of Neurology (F.S.E.), Massachusetts General Hospital, Boston, MA. Dr. van Ballegoij is currently at the Department of Neurology, Zaans Medisch Centrum, Zaandam.

Sacha Ferdinandusse (S)

From the Department of Pediatric Neurology/Emma Children's Hospital (M.E., W.J.C.B., I.C.H.), Amsterdam UMC, Amsterdam Leukodystrophy Center, University of Amsterdam, the Netherlands; Division of Child Neurology (E.J.M.), Department of Pediatrics, Weill Cornell Medicine/NewYork-Presbyterian Hospital, NY; Department of Neurology & Pediatrics/Lucile Packard Children's Hospital (K.P.V.H.), Stanford University School of Medicine, Palo Alto, CA 4. Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Germany; Unit of Rare Neurodegenerative and Neurometabolic Diseases (E.S.), Fondazione IRCCS Istituto Neurologico C. Besta, Milano, Italy; Department of Pediatric Endocrinology/Emma Children's Hospital (A.S.P.T.), Amsterdam UMC, University of Amsterdam, the Netherlands; AP-HP (F.M.), Department of Medical Genetics, Reference Center for Adult Neurometabolic Diseases and Leukodystrophies, and INSERM U 1127, CNRS UMR 7225, Paris Brain Institute, La Pitié-Salpêtrière University Hospital, Paris, France; Department of Pediatric Neurology/Hôpital Bicêtre Paris Sud (C.S.), France, Reference Center for Children Leukodystrophies Inserm U1127, ICM-Hôpital Pitié Salpêtrière, Paris, France; Division of Pediatric Endocrinology and Diabetes (M.O.R.), Children's Hospital at Montefiore, Albert Einstein College of Medicine of Medicine, Bronx, NY; Neuroendocrine Unit (N.A.T.), Massachusetts General Hospital, Boston, MA; Harvard Medical School (N.A.T.), Boston, MA; Division of Pediatric Endocrinology (A.H.), Department of Pediatrics, Massachusetts General Hospital, Boston, MA, and Harvard Medical School (A.H.), Boston, MA; Charles Dent Metabolic Unit (R.H.L.), National Hospital for Neurology and Neurosurgery, London, United Kingdom; Metabolic Medicine (J.D.), Great Ormond Street Hospital for Children, London United Kingdom; Department of Genetic Medicine (G.V.R.), Johns Hopkins, Baltimore, MD; Division of Pediatric Blood and Marrow Transplantation & Cellular Therapy (T.L., P.J.O.), University of Minnesota, Minneapolis; Pediatric Oncology (J.-S.K.), Hematology, Hemostaseology, University Hospital Leipzig, Germany; Pediatric Blood and Bone Marrow Transplantation (C.A.L.), Princess Maxima Center Utrecht, the Netherlands; Department of Pediatrics (C.A.L.), Wilhemina Children's Hospital, UMC Utrecht, Utrecht University, the Netherlands; Director of Pediatric Neuroimaging (P.C.), Lenox Hill Radiology and Medical Imaging Associates, New York, NY; Moser Center for Leukodystrophies (B.R.T., A.F.), Kennedy Krieger Institute, Johns Hopkins Medical Institutions, Baltimore, MD; Department of Neurogenetics (A.B.M.), Kennedy Krieger Institute, Baltimore, MD; Laboratory Genetic Metabolic Diseases (F.M.V., S.F., S.K.), Department of Clinical Chemistry and Pediatrics, Amsterdam UMC, Amsterdam Gastroenterology Endocrinology Metabolism, University of Amsterdam, the Netherlands; and Department of Neurology (F.S.E.), Massachusetts General Hospital, Boston, MA. Dr. van Ballegoij is currently at the Department of Neurology, Zaans Medisch Centrum, Zaandam.

Stephan Kemp (S)

From the Department of Pediatric Neurology/Emma Children's Hospital (M.E., W.J.C.B., I.C.H.), Amsterdam UMC, Amsterdam Leukodystrophy Center, University of Amsterdam, the Netherlands; Division of Child Neurology (E.J.M.), Department of Pediatrics, Weill Cornell Medicine/NewYork-Presbyterian Hospital, NY; Department of Neurology & Pediatrics/Lucile Packard Children's Hospital (K.P.V.H.), Stanford University School of Medicine, Palo Alto, CA 4. Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Germany; Unit of Rare Neurodegenerative and Neurometabolic Diseases (E.S.), Fondazione IRCCS Istituto Neurologico C. Besta, Milano, Italy; Department of Pediatric Endocrinology/Emma Children's Hospital (A.S.P.T.), Amsterdam UMC, University of Amsterdam, the Netherlands; AP-HP (F.M.), Department of Medical Genetics, Reference Center for Adult Neurometabolic Diseases and Leukodystrophies, and INSERM U 1127, CNRS UMR 7225, Paris Brain Institute, La Pitié-Salpêtrière University Hospital, Paris, France; Department of Pediatric Neurology/Hôpital Bicêtre Paris Sud (C.S.), France, Reference Center for Children Leukodystrophies Inserm U1127, ICM-Hôpital Pitié Salpêtrière, Paris, France; Division of Pediatric Endocrinology and Diabetes (M.O.R.), Children's Hospital at Montefiore, Albert Einstein College of Medicine of Medicine, Bronx, NY; Neuroendocrine Unit (N.A.T.), Massachusetts General Hospital, Boston, MA; Harvard Medical School (N.A.T.), Boston, MA; Division of Pediatric Endocrinology (A.H.), Department of Pediatrics, Massachusetts General Hospital, Boston, MA, and Harvard Medical School (A.H.), Boston, MA; Charles Dent Metabolic Unit (R.H.L.), National Hospital for Neurology and Neurosurgery, London, United Kingdom; Metabolic Medicine (J.D.), Great Ormond Street Hospital for Children, London United Kingdom; Department of Genetic Medicine (G.V.R.), Johns Hopkins, Baltimore, MD; Division of Pediatric Blood and Marrow Transplantation & Cellular Therapy (T.L., P.J.O.), University of Minnesota, Minneapolis; Pediatric Oncology (J.-S.K.), Hematology, Hemostaseology, University Hospital Leipzig, Germany; Pediatric Blood and Bone Marrow Transplantation (C.A.L.), Princess Maxima Center Utrecht, the Netherlands; Department of Pediatrics (C.A.L.), Wilhemina Children's Hospital, UMC Utrecht, Utrecht University, the Netherlands; Director of Pediatric Neuroimaging (P.C.), Lenox Hill Radiology and Medical Imaging Associates, New York, NY; Moser Center for Leukodystrophies (B.R.T., A.F.), Kennedy Krieger Institute, Johns Hopkins Medical Institutions, Baltimore, MD; Department of Neurogenetics (A.B.M.), Kennedy Krieger Institute, Baltimore, MD; Laboratory Genetic Metabolic Diseases (F.M.V., S.F., S.K.), Department of Clinical Chemistry and Pediatrics, Amsterdam UMC, Amsterdam Gastroenterology Endocrinology Metabolism, University of Amsterdam, the Netherlands; and Department of Neurology (F.S.E.), Massachusetts General Hospital, Boston, MA. Dr. van Ballegoij is currently at the Department of Neurology, Zaans Medisch Centrum, Zaandam.

Ali Fatemi (A)

From the Department of Pediatric Neurology/Emma Children's Hospital (M.E., W.J.C.B., I.C.H.), Amsterdam UMC, Amsterdam Leukodystrophy Center, University of Amsterdam, the Netherlands; Division of Child Neurology (E.J.M.), Department of Pediatrics, Weill Cornell Medicine/NewYork-Presbyterian Hospital, NY; Department of Neurology & Pediatrics/Lucile Packard Children's Hospital (K.P.V.H.), Stanford University School of Medicine, Palo Alto, CA 4. Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Germany; Unit of Rare Neurodegenerative and Neurometabolic Diseases (E.S.), Fondazione IRCCS Istituto Neurologico C. Besta, Milano, Italy; Department of Pediatric Endocrinology/Emma Children's Hospital (A.S.P.T.), Amsterdam UMC, University of Amsterdam, the Netherlands; AP-HP (F.M.), Department of Medical Genetics, Reference Center for Adult Neurometabolic Diseases and Leukodystrophies, and INSERM U 1127, CNRS UMR 7225, Paris Brain Institute, La Pitié-Salpêtrière University Hospital, Paris, France; Department of Pediatric Neurology/Hôpital Bicêtre Paris Sud (C.S.), France, Reference Center for Children Leukodystrophies Inserm U1127, ICM-Hôpital Pitié Salpêtrière, Paris, France; Division of Pediatric Endocrinology and Diabetes (M.O.R.), Children's Hospital at Montefiore, Albert Einstein College of Medicine of Medicine, Bronx, NY; Neuroendocrine Unit (N.A.T.), Massachusetts General Hospital, Boston, MA; Harvard Medical School (N.A.T.), Boston, MA; Division of Pediatric Endocrinology (A.H.), Department of Pediatrics, Massachusetts General Hospital, Boston, MA, and Harvard Medical School (A.H.), Boston, MA; Charles Dent Metabolic Unit (R.H.L.), National Hospital for Neurology and Neurosurgery, London, United Kingdom; Metabolic Medicine (J.D.), Great Ormond Street Hospital for Children, London United Kingdom; Department of Genetic Medicine (G.V.R.), Johns Hopkins, Baltimore, MD; Division of Pediatric Blood and Marrow Transplantation & Cellular Therapy (T.L., P.J.O.), University of Minnesota, Minneapolis; Pediatric Oncology (J.-S.K.), Hematology, Hemostaseology, University Hospital Leipzig, Germany; Pediatric Blood and Bone Marrow Transplantation (C.A.L.), Princess Maxima Center Utrecht, the Netherlands; Department of Pediatrics (C.A.L.), Wilhemina Children's Hospital, UMC Utrecht, Utrecht University, the Netherlands; Director of Pediatric Neuroimaging (P.C.), Lenox Hill Radiology and Medical Imaging Associates, New York, NY; Moser Center for Leukodystrophies (B.R.T., A.F.), Kennedy Krieger Institute, Johns Hopkins Medical Institutions, Baltimore, MD; Department of Neurogenetics (A.B.M.), Kennedy Krieger Institute, Baltimore, MD; Laboratory Genetic Metabolic Diseases (F.M.V., S.F., S.K.), Department of Clinical Chemistry and Pediatrics, Amsterdam UMC, Amsterdam Gastroenterology Endocrinology Metabolism, University of Amsterdam, the Netherlands; and Department of Neurology (F.S.E.), Massachusetts General Hospital, Boston, MA. Dr. van Ballegoij is currently at the Department of Neurology, Zaans Medisch Centrum, Zaandam.

Florian S Eichler (FS)

From the Department of Pediatric Neurology/Emma Children's Hospital (M.E., W.J.C.B., I.C.H.), Amsterdam UMC, Amsterdam Leukodystrophy Center, University of Amsterdam, the Netherlands; Division of Child Neurology (E.J.M.), Department of Pediatrics, Weill Cornell Medicine/NewYork-Presbyterian Hospital, NY; Department of Neurology & Pediatrics/Lucile Packard Children's Hospital (K.P.V.H.), Stanford University School of Medicine, Palo Alto, CA 4. Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Germany; Unit of Rare Neurodegenerative and Neurometabolic Diseases (E.S.), Fondazione IRCCS Istituto Neurologico C. Besta, Milano, Italy; Department of Pediatric Endocrinology/Emma Children's Hospital (A.S.P.T.), Amsterdam UMC, University of Amsterdam, the Netherlands; AP-HP (F.M.), Department of Medical Genetics, Reference Center for Adult Neurometabolic Diseases and Leukodystrophies, and INSERM U 1127, CNRS UMR 7225, Paris Brain Institute, La Pitié-Salpêtrière University Hospital, Paris, France; Department of Pediatric Neurology/Hôpital Bicêtre Paris Sud (C.S.), France, Reference Center for Children Leukodystrophies Inserm U1127, ICM-Hôpital Pitié Salpêtrière, Paris, France; Division of Pediatric Endocrinology and Diabetes (M.O.R.), Children's Hospital at Montefiore, Albert Einstein College of Medicine of Medicine, Bronx, NY; Neuroendocrine Unit (N.A.T.), Massachusetts General Hospital, Boston, MA; Harvard Medical School (N.A.T.), Boston, MA; Division of Pediatric Endocrinology (A.H.), Department of Pediatrics, Massachusetts General Hospital, Boston, MA, and Harvard Medical School (A.H.), Boston, MA; Charles Dent Metabolic Unit (R.H.L.), National Hospital for Neurology and Neurosurgery, London, United Kingdom; Metabolic Medicine (J.D.), Great Ormond Street Hospital for Children, London United Kingdom; Department of Genetic Medicine (G.V.R.), Johns Hopkins, Baltimore, MD; Division of Pediatric Blood and Marrow Transplantation & Cellular Therapy (T.L., P.J.O.), University of Minnesota, Minneapolis; Pediatric Oncology (J.-S.K.), Hematology, Hemostaseology, University Hospital Leipzig, Germany; Pediatric Blood and Bone Marrow Transplantation (C.A.L.), Princess Maxima Center Utrecht, the Netherlands; Department of Pediatrics (C.A.L.), Wilhemina Children's Hospital, UMC Utrecht, Utrecht University, the Netherlands; Director of Pediatric Neuroimaging (P.C.), Lenox Hill Radiology and Medical Imaging Associates, New York, NY; Moser Center for Leukodystrophies (B.R.T., A.F.), Kennedy Krieger Institute, Johns Hopkins Medical Institutions, Baltimore, MD; Department of Neurogenetics (A.B.M.), Kennedy Krieger Institute, Baltimore, MD; Laboratory Genetic Metabolic Diseases (F.M.V., S.F., S.K.), Department of Clinical Chemistry and Pediatrics, Amsterdam UMC, Amsterdam Gastroenterology Endocrinology Metabolism, University of Amsterdam, the Netherlands; and Department of Neurology (F.S.E.), Massachusetts General Hospital, Boston, MA. Dr. van Ballegoij is currently at the Department of Neurology, Zaans Medisch Centrum, Zaandam.

Irene C Huffnagel (IC)

From the Department of Pediatric Neurology/Emma Children's Hospital (M.E., W.J.C.B., I.C.H.), Amsterdam UMC, Amsterdam Leukodystrophy Center, University of Amsterdam, the Netherlands; Division of Child Neurology (E.J.M.), Department of Pediatrics, Weill Cornell Medicine/NewYork-Presbyterian Hospital, NY; Department of Neurology & Pediatrics/Lucile Packard Children's Hospital (K.P.V.H.), Stanford University School of Medicine, Palo Alto, CA 4. Department of Neurology, Leukodystrophy Clinic, University of Leipzig Medical Center, Germany; Unit of Rare Neurodegenerative and Neurometabolic Diseases (E.S.), Fondazione IRCCS Istituto Neurologico C. Besta, Milano, Italy; Department of Pediatric Endocrinology/Emma Children's Hospital (A.S.P.T.), Amsterdam UMC, University of Amsterdam, the Netherlands; AP-HP (F.M.), Department of Medical Genetics, Reference Center for Adult Neurometabolic Diseases and Leukodystrophies, and INSERM U 1127, CNRS UMR 7225, Paris Brain Institute, La Pitié-Salpêtrière University Hospital, Paris, France; Department of Pediatric Neurology/Hôpital Bicêtre Paris Sud (C.S.), France, Reference Center for Children Leukodystrophies Inserm U1127, ICM-Hôpital Pitié Salpêtrière, Paris, France; Division of Pediatric Endocrinology and Diabetes (M.O.R.), Children's Hospital at Montefiore, Albert Einstein College of Medicine of Medicine, Bronx, NY; Neuroendocrine Unit (N.A.T.), Massachusetts General Hospital, Boston, MA; Harvard Medical School (N.A.T.), Boston, MA; Division of Pediatric Endocrinology (A.H.), Department of Pediatrics, Massachusetts General Hospital, Boston, MA, and Harvard Medical School (A.H.), Boston, MA; Charles Dent Metabolic Unit (R.H.L.), National Hospital for Neurology and Neurosurgery, London, United Kingdom; Metabolic Medicine (J.D.), Great Ormond Street Hospital for Children, London United Kingdom; Department of Genetic Medicine (G.V.R.), Johns Hopkins, Baltimore, MD; Division of Pediatric Blood and Marrow Transplantation & Cellular Therapy (T.L., P.J.O.), University of Minnesota, Minneapolis; Pediatric Oncology (J.-S.K.), Hematology, Hemostaseology, University Hospital Leipzig, Germany; Pediatric Blood and Bone Marrow Transplantation (C.A.L.), Princess Maxima Center Utrecht, the Netherlands; Department of Pediatrics (C.A.L.), Wilhemina Children's Hospital, UMC Utrecht, Utrecht University, the Netherlands; Director of Pediatric Neuroimaging (P.C.), Lenox Hill Radiology and Medical Imaging Associates, New York, NY; Moser Center for Leukodystrophies (B.R.T., A.F.), Kennedy Krieger Institute, Johns Hopkins Medical Institutions, Baltimore, MD; Department of Neurogenetics (A.B.M.), Kennedy Krieger Institute, Baltimore, MD; Laboratory Genetic Metabolic Diseases (F.M.V., S.F., S.K.), Department of Clinical Chemistry and Pediatrics, Amsterdam UMC, Amsterdam Gastroenterology Endocrinology Metabolism, University of Amsterdam, the Netherlands; and Department of Neurology (F.S.E.), Massachusetts General Hospital, Boston, MA. Dr. van Ballegoij is currently at the Department of Neurology, Zaans Medisch Centrum, Zaandam.

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