1. Clinical GeneticsAmiens University HospitalAmiens France
2. University of Picardy Jules Verne EA 4666 Amiens France
3. Department of translational medicine and NeurogeneticsInstitut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC)Illkirch France
4. Inserm U1258Illkirch France
5. CNRS UMR7104Illkirch France
6. Strasbourg UniversityIllkirch France
7. Laboratoire Diagnostic GénétiqueCHRUStrasbourg France
8. Department of NeurologyAPHP, CHU de BicêtreLe Kremlin Bicêtre France
9. French National Reference Center for Rare Neuropathies (NNERF) Le Kremlin Bicêtre France
10. Inserm U1195 & Paris‐Sud University Le Kremlin Bicêtre France
11. Department of NeurologyCHRU Cavale BlancheBrest France
12. Neuromuscular and Rare Diseases Unit, Department of Neuroscience, Fondazione IRCCS Ca' GrandaOspedale Maggiore PoliclinicoMilan Italy
13. Department of Pathology ‐ EA 4685 LNBCHRU MorvanBrest France
14. Department of PathologyLille University HospitalLille France
15. CHU Lille, Inserm U1171, Service de neurologie, Centre de Référence des Maladies Neuromusculaires Nord Est Ile‐de‐FranceLille UniversityLille France
16. Service de NeuropédiatrieCHRU de LilleLille France