[1] Ctr Hosp Reg Univ, Serv Neuropediat, F-59037 Lille, France
[2] Fac Med Lille, F-59037 Lille, France
[3] Ctr Hosp Reg Univ, Serv Anat Pathol, Lille, France
[4] Ctr Hosp Univ, JE 2053, Lab Biopathol Neuromusculaire, Marseille, France
[5] Fac Med Timone, Marseille, France
[6] Hop Ray Poincare, Serv Reanimat Pediat, Garches, France
[7] Hop La Pitie Salpetriere, Inst Myol, Paris, France
[8] Univ Western Australia, Australian Neuromuscular Res Inst, Ctr Neuromuscular & Neurol Disorders, Nedlands, WA 6009, Australia
[9] Sahlgrenska Univ Hosp, Dept Pathol, Gothenburg, Sweden