1. Department of Neurology, North Hospital; University Hospital of Saint-Etienne; 42055 Saint-Etienne cedex 02 France
2. Rhône-Alpes Reference Center for Rare Neuromuscular Diseases; 42055 Saint-Etienne cedex 2 France
3. Department of Neurophysiology; University Pierre Wertheimer Hospital of Lyon; Lyon France
4. Department of Neurophysiology; University Hospital of Toulouse; Toulouse France
5. Department of Neurophysiology; University Hospital of Strasbourg; Strasbourg France
6. Department of Neurophysiology; University Hospital of Nice; Nice France
7. Department of Neurology; University Hospital of Clermont-Ferrand; Clermont-Ferrand France
8. Medical office, Neurology; 62, Rue Saint-Maximin 69003 Lyon; France
9. Department of Neurophysiology; University Hospital of Nantes; Nantes France
10. Department of Neurophysiology; University Hospital of Nancy; Nancy France