From the French National Authority for Health (A.D., M.G.), Saint-Denis; University of Paris, ECEVE (A.D., M.G.), Inserm, U1123, Paris; Occupational Therapy Clinic (C. Lager), Mouans Sartoux; ESEAN-APF Pediatric Rehabilitation Center (C. de Lattre), Nantes; Bourgès Clinic (Y.G.), Castelnau-le-lez; Société d'études et de soins pour les enfants paralysés et polymalformés (E.K.), Antony; Hôpitaux de Saint-Maurice (B.F.); ISPO France (H.C.), Lyon; Physiotherapy Clinic (Z.S.), Orléans; Neuropediatrics Department (A.I.), Hôpital Armand Trousseau, CRMR Neuromuscular Pathologies, APHP, Paris, France; Orthopedic Department (E.V.), Neuro-orthopedics Unit and Movement Analysis Center, Université Bâle, Basel, Switzerland; Fondation Paralysie Cérébrale (M.C., M.H., J.B., N.G.), Paris; Association Française de Pédiatrie Ambulatoire (P.V.), Talence; Physical and Rehabilitation Medicine Department (X.B.), Neurosciences, CHU, Toulouse; ToNIC, Toulouse NeuroImaging Center (X.B.), University of Toulouse, Inserm, UPS, Toulouse; ISIR (A.F.), Sorbonne University, Paris; Physical and Medical Rehabilitation Department (S.B.), CHRU Brest; Paediatric Physical and Medical Rehabilitation Department (S.B.), Fondation ILDYS, Brest; and University of Western Brittany (S.B.), Laboratory of Medical Information Processing, Inserm U1101, Brest, France. anthony.demont@gmail.com.