[1] Radboud Univ Nijmegen Med Ctr, Donders Inst Brain Cognit & Behav, Dept Human Genet, NL-6525 GA Nijmegen, Netherlands
[2] Univ Antwerp, Ctr Mol Neurol, B-2610 Antwerp, Belgium
[3] Univ Antwerp, Inst Born Bunge, B-2610 Antwerp, Belgium
[4] Antwerp Univ Hosp, Dept Neurol, Neuromuscular Reference Ctr, B-6520 Antwerp, Belgium
[5] Radboud Univ Nijmegen Med Ctr, Dept Neurol, Donders Inst Brain Cognit & Behav, NL-6525 GC Nijmegen, Netherlands