[1] Fdn Ist Ricovero & Cura Carattere Sci IRCCS, Ist Neurol Carlo Besta, Unit Med Genet & Neurogenet, Milan, Italy
[2] Univ Oxford, Wellcome Ctr Human Genet, Oxford, England
[3] Oxford Biomed Res Ctr, Natl Inst Hlth Res, Oxford, England
[4] Ctr Hosp Univ Angers, Ctr Reference Malad Neuromusculaires, Angers, France
[5] Yale Sch Med, Dept Genet, New Haven, CT USA