[1] Erasmus MC, MS Ctr ErasMS, Dept Neurol, NL-3000 CA Rotterdam, Netherlands
[2] Erasmus MC, Dept Epidemiol & Biostat & Clin Genet, Genet Epidemiol Unit, NL-3000 CA Rotterdam, Netherlands
[3] Univ Oxford, Wellcome Trust Ctr Human Genet, Oxford OX3 9DU, England
[4] Univ Oxford, Dept Clin Neurol, Oxford OX3 9DU, England
[5] Karolinska Inst, Dept Neurol, SE-14186 Stockholm, Sweden
[6] Univ British Columbia, Dept Med Genet, Div Neurol, Vancouver, BC V6T 2B5, Canada
[7] VIB, Dept Mol Genet, Appl Mol Genom Grp, B-2610 Antwerp, Belgium
[8] VIB, Dept Mol Genet, Neurodegenerat Brain Dis Grp, B-2610 Antwerp, Belgium
[9] Univ Antwerp, B-2610 Antwerp, Belgium