[1] Hosp Sick Children, Neurosci & Mental Hlth, Toronto, ON M5G 1X8, Canada
[2] Univ Toronto, Paediat, Toronto, ON, Canada
[3] Hosp Sick Children, Div Neurol, Toronto, ON M5G 1X8, Canada
[4] Childrens Hosp Philadelphia, Ctr Appl Gen, Philadelphia, PA 19104 USA
[5] Evidera, London, England
[6] Reg Hosp, Dept Neurol, Lugano, Switzerland
[7] McGill Univ, Montreal Neurol Inst, Brain Imaging Ctr, Montreal, PQ, Canada
[8] McGill Univ, Montreal Neurol Inst, Expt Therapeut Program, Montreal, PQ, Canada
[9] McGill Univ, Montreal Neurol Inst, Neuroimmunol Unit, Montreal, PQ, Canada
[10] Univ Manitoba, Internal Med & Community Hlth Sci, Winnipeg, MB, Canada
[11] Univ British Columbia, Fac Med, Med Genet, Vancouver, BC, Canada
[12] Childrens Hosp Philadelphia, Div Neurol, Philadelphia, PA 19104 USA