[1] Hosp Sick Children, Res Inst, Program Genet & Genom Biol, Toronto, ON M5G 1X8, Canada
[2] Univ Toronto, Dept Mol & Med Genet, Toronto, ON M5G 1X8, Canada
[3] Inst Nazl Neurol, I-20133 Milan, Italy
[4] Oasi Inst Res Mental Retardat & Brain Aging, Dept Neurol, I-94018 Troina, Italy
[5] Hosp Sick Children, Dept Pathol & Lab Med, Toronto, ON M5G 1X8, Canada
[6] Clin Neurol & Psychiat Children & Youth, YU-11000 Belgrade, Serbia Monteneg, Serbia
[7] King Faisal Specialist Hosp & Res Ctr, Dept Neurosci, Riyadh 11211, Saudi Arabia
[8] McGill Univ, Montreal Neurol Inst, Neurogenet Unit, Montreal, PQ H3A 2B4, Canada
[9] McGill Univ, Montreal Gen Hosp, Ctr Hlth, Res Inst Ctr Res Neurosci, Montreal, PQ H3G 1A4, Canada
[10] Univ Calif Los Angeles, Sch Med, W Los Angeles DVA Med Ctr, Dept Neurol,Comprehens Epilepsy Program, Los Angeles, CA 90073 USA
[11] Univ Calif Los Angeles, Sch Med, W Los Angeles DVA Med Ctr, Brain Res Inst, Los Angeles, CA 90073 USA
[12] Hosp Sick Children, Dept Pediat, Div Neurol, Toronto, ON M5G 1X8, Canada