[1] Childrens Hosp Eastern Ontario, Div Neurol, Ottawa, ON, Canada
[2] Univ Ottawa, Dept Pediat, Ottawa, ON, Canada
[3] Childrens Hosp Eastern Ontario, Clin Res Unit, Ottawa, ON, Canada
[4] Childrens Hosp Eastern Ontario, Div Neonatol, Ottawa, ON, Canada
[5] Hosp Sick Children, Div Neurol, Toronto, ON, Canada
[6] Univ Toronto, Dept Pediat, Toronto, ON, Canada