1. Reference Center for Neuromuscular Disorders and ALS APHMCHU La Timone Marseille France
2. Marseille Medical Genetics Aix‐Marseille University–Inserm UMR 1251 Marseille France
3. CEReSS–Health Service Research and Quality of Life Center Aix‐Marseille University Marseille France
4. Reference Center for Neuromuscular Diseases North/East/Ile de France Hôpital Pitié‐SalpêtrièreAP‐HP Paris France
5. Reference Center for Neuromuscular Disorders AOC and National Reference Center for Neurogenetic Diseases Angers University Hospital Angers France
6. Department of Clinical Neurophysiology Reference Center for NMD CHU Nantes Nantes France
7. Department of Neurology APHPCHU de Bicêtre Le Kremlin‐Bicêtre France
8. French National Reference Center for Rare Neuropathies Le Kremlin‐Bicêtre France
9. Inserm U1195 and Paris‐Sud University Le Kremlin‐Bicêtre France
10. Reference Center for Neuromuscular Disorders AOC CHU de Bordeaux Bordeaux France
11. Peripheral Nervous System Service Muscle et SLA Centre Hospitalier Universitaire de NiceUniversité Côte d'Azur Nice France
12. Neurology Department CHRU Cavale Blanche Brest France
13. Department of Neurology Hôpital de HautepierreCHU de Strasbourg Strasbourg France
14. Reference Center for Neuromuscular Disorders AOC Department of Neurology CHU Montpellier Montpellier France
15. Inserm U1171 Department of Neurology Reference Center for Neuromuscular Diseases North/East/Ile de France CHU LilleLille University Lille France