[1] Hosp Sick Children, Div Emergency Med, Dept Paediat, Toronto, ON, Canada
[2] Univ Toronto, Hosp Sick Children, Div Emergency Med, Dept Paediat, Toronto, ON, Canada
[3] Univ Toronto, Hosp Sick Children, Div Clin Pharmacol & Toxicol, Dept Paediat, Toronto, ON, Canada