[1] McMaster Childrens Hosp, Dept Pediat, Div Pediat Crit Care, Hamilton, ON, Canada
[2] McMaster Univ, Hamilton, ON, Canada
[3] McMaster Univ, Dept Hlth Res Methods Evidence & Impact, Hamilton, ON, Canada
[4] Hosp Sick Children, Dept Pediat, Div Emergency Med, Toronto, ON, Canada
[5] Univ Toronto, Toronto, ON, Canada