[1] Univ Copenhagen, Dept Neurol, Copenhagen Neuromuscular Ctr, Rigshosp, Copenhagen, Denmark
[2] Univ Helsinki, Clin Neurosci, Neurol, Helsinki, Finland
[3] Helsinki Univ Hosp, Helsinki, Finland
[4] UCB Pharma, Espoo, Finland
[5] MedEngine Oy, Helsinki, Finland
[6] MedEngine DK ApS, Copenhagen, Denmark
[7] UCB Pharma, Brussels, Belgium
[8] UCB Pharma, Copenhagen, Denmark
[9] Karolinska Inst, Dept Clin Neurosci, Stockholm, Sweden
[10] Karolinska Univ Hosp, Dept Neurol, Stockholm, Sweden