[1] Montreal Neurol Hosp & Inst, Epilepsy Serv, Montreal, PQ H3A 2B4, Canada
[2] Montreal Neurol Hosp & Inst, Neurogenet Unit, Montreal, PQ H3A 2B4, Canada
[3] McGill Univ, Dept Neurol & Neurosurg, Montreal, PQ, Canada
[4] McGill Univ, Dept Pediat, Montreal, PQ, Canada
[5] McGill Univ, Dept Human Genet, Montreal, PQ, Canada