[1] CHU Timone, Ctr Reference Neuromuscular Dis, Univ Teaching Hosp, F-13385 Marseille, France
[2] CHU Timone, ALS, Univ Teaching Hosp, F-13385 Marseille, France
[3] CHU Timone Children, Dept Med Genet, Childrens Hosp Timone, Univ Teaching Hosp, F-13385 Marseille, France
[4] INSERM, Fac Med Timone, UMR S 910, F-13385 Marseille, France
[5] Univ Teaching Hosp Pitie Salpetriere, Ctr Reference Neuromuscular Dis, Inst Myol, F-75013 Paris, France
[6] Hop Marin, AP HP, Ctr Reference Neuromusculaire GNMH, F-64701 Hendaye, France