1. From the Medicine Genetics Group (M.C.-R., L.B.-P., M.C.-S., J.L.-C., E.F.T.), Vall d'Hebron Research Institute (VHIR); Department of Clinical and Molecular Genetics (M.C.-R., L.B.-P., M.C.-S., J.L.-C., E.F.T.), Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona (UAB), Barcelona, Spain; Neuromuscular Unit (L.G., M.G.-G.D.B., R.G.-U., P.S.-V., S.D., S.Q.-R.), Pediatric Neurology and ICU Department, Raymond Poincaré Hospital (UVSQ), AP-HP Université Paris-Saclay, Garches; and...