1. Neurology Department APHP, CHU de Bicêtre Le Kremlin‐Bicêtre France
2. French National Reference Center for Rare Neuropathies Le Kremlin‐Bicêtre France
3. INSERM U1195 Paris‐Saclay University Le Kremlin‐Bicêtre France
4. Neurology Department CHU Timone Marseille France
5. Neurology Department Hôpitaux Universitaires de Strasbourg Strasbourg France
6. Neurology Department CHU Henri MondorAPHPUPEC Créteil France
7. Pediatric Neurology Department Assistance Publique‐Hôpitaux de Paris Bicêtre Hospital French National Reference Center of Rare Inflammatory Brain and Spinal Diseases University Hospitals Paris Saclay Le Kremlin‐Bicêtre France
8. Department of Molecular Genetics, Pharmacogenomics, and Hormonology APHPCHU de Bicêtre Le Kremlin‐Bicêtre France
9. Clinical Neurophysiology Department Brest University Hospital Brest France
10. Nerve‐Muscle Unit Department of Clinical Neurosciences Lausanne University Hospital and University of Lausanne Lausanne Switzerland
11. East Biology Center Hospices Civils de Lyon Bron France
12. Nerve‐Muscle Unit Referral Center for Neuromuscular Diseases AOCUniversity Hospitals of Bordeaux (Pellegrin Hospital) Bordeaux France
13. Neurology Department CHU Limoges Limoges France
14. Neurology Department Saint‐Denis Hospital Saint‐Denis France
15. Reference Center for Neuromuscular Diseases APHPSorbonne UniversitéCHU Pitié‐Salpêtrière Paris France
16. Department of Clinical Neurophysiology APHPCHU Pitié‐Salpêtrière Paris France
17. Lille University Hospital Center U1171 Centre de Référence des Maladies Neuromusculaires Nord Est Ile de France Lille France
18. Neuromuscular Reference Center Neurology Department University Hospital Saint‐Luc Brussels Belgium