[1] McGill Univ, Montreal Childrens Hosp, Dept Pediat, Div Child Neurol,Hlth Ctr, Montreal, PQ, Canada
[2] McGill Univ, Montreal Childrens Hosp, Dept Med Imaging, Hlth Ctr, Montreal, PQ, Canada
[3] McGill Univ, Hlth Ctr, Res Inst, Montreal, PQ, Canada
[4] McGill Univ, Hlth Ctr, Dept Neurol & Neurosurg, Montreal, PQ, Canada