[1] Clin Neurol & Psychiat Children & Youth, Belgrade, Serbia
[2] Hosp St Joan Deu, Neuromuscular Pathol Unit, Barcelona, Spain
[3] St Jude Childrens Res Hosp, Memphis, TN USA
[4] Childrens Hosp, Philadelphia, PA USA
[5] Shriners Hosp Children, Portland, OR USA
[6] Virginia Commonwealth Univ, Richmond, VA USA
[7] Connecticut Childrens Med Ctr, Hartford, CT USA
[8] Schneider Childrens Med Ctr, Tel Aviv, Israel
[9] Radboud Univ Nijmegen, Med Ctr, Nijmegen, Netherlands
[10] Ludwig Maximilian Univ Munic, Munic, Germany
[11] Italfarmaco Grp, Milan, Italy
[12] Hosp Univ & Politecn La Fe, Valencia, Spain