[1] Univ Washington, Med Ctr, Dept Neurol, Seattle, WA USA
[2] Ctr Hosp Univ Nice, Nice, France
[3] Ohio State Univ, Columbus, OH USA
[4] Univ Sheffield, Dept Neurosci, Sheffield, S Yorkshire, England
[5] Vall dHebron Univ Hosp, Barcelona, Spain
[6] Univ Oxford, Nuffield Dept Clin Neurosci, Oxford, England
[7] Oslo Univ Hosp, Dept Neurol, Oslo, Norway
[8] Tokyo Med Univ, Dept Neurol, Tokyo, Japan
[9] Univ Arizona, Sch Med, Neuromuscular Clin & Res Ctr, Tucson, AZ USA
[10] Med Univ Warsaw, Warsaw, Poland
[11] UCB Pharma, Monheim, Germany
[12] UCB Pharma, Cambridge, MA USA
[13] UCB Pharma, Brussels, Belgium
[14] Univ N Carolina, Dept Neurol, Chapel Hill, NC USA