[1] Robert Jones & Agnes Hunt Orthopaed Hosp, Wolfson Ctr Inherited Neuromuscular Dis, Oswestry SY10 7AG, Shrops, England
[2] Keele Univ, Inst Sci & Tech Med, Keele, Staffs, England
[3] Univ Paris 06, Paris, France
[4] Inst Myol, Unite Mixt Res Sante 787, Paris, France
[5] Univ Nottingham, Queens Med Ctr, Inst Genet, Nottingham NG7 2RD, England