[1] Harvard Med Sch, Boston Childrens Hosp, Dept Neurol, Boston, MA 02115 USA
[2] Hop Armand Trousseau, I Mot, Paris, France
[3] Univ Paris, NeuroDiderot, UMR 1141, Paris, France
[4] Stanford Univ, Dept Neurol, Stanford, CA 94305 USA
[5] UZ Gent, Neuromuscular Reference Ctr, Ghent, Belgium
[6] ULB, Ctr Reference Malad Neuromusculaires, Queen Fabiola Childrens Univ Hosp, Brussels, Belgium
[7] Univ Childrens Hosp Basel, Paediat Neurol, Basel, Switzerland
[8] Univ Bern, Inselspital, Paediat Neurol, Bern, Switzerland
[9] Fdn IRCCS Ist Neurol Carlo Besta, Dev Neurol Unit, Milan, Italy
[10] Med Univ Gdansk, Dept Dev Neurol, Gdansk, Poland
[11] Catholic Univ, Pediat Neurol Inst, Washington, DC USA
[12] Fdn Policlin Gemelli IRCCS, Nemo Pediat, Rome, Italy
[13] Childrens Hosp Westmead, Paediat Gait Anal Serv New South Wales, Westmead, NSW, Australia
[14] MDUK Oxford Neuromuscular Ctr, Dept Paediat, Oxford, England
[15] Univ Hosp Liege, Ctr References Malad Neuromusculaires, Dept Pediat, Div Child Neurol, Liege, Belgium
[16] Univ Liege, Liege, Belgium
[17] Pirogov Russian Natl Res Med Univ, Russian Children Neuromuscular Ctr, Veltischev Clin Pediat Res Inst, Moscow, Russia
[18] Peking Univ First Hosp, Dept Pediat, Beijing, Peoples R China
[19] Univ Sao Paulo, Fac Med, Dept Neurol, FMUSP, Sao Paulo, Brazil
[20] F Hoffmann La Roche Ltd, Pharma Dev Neurol, Basel, Switzerland
[21] Roche Prod Ltd, Welwyn Garden City, Herts, England
[22] F Hoffmann La Roche Ltd, Pharma Dev Safety, Basel, Switzerland
[23] F Hoffmann La Roche Ltd, PDMA Neurosci & Rare Dis, Basel, Switzerland
[24] Roche Innovat Ctr Basel, Roche Pharmaceut Res & Early Dev, Basel, Switzerland
[25] UCL, NIHR Great Ormond St Hosp Biomed Res Ctr, Great Ormond St Inst Child Hlth, Dubowitz Neuromuscular Ctr, London, England
[26] Great Ormond St Hosp Trust, London, England