[1] Royal Jubilee Hosp, Dept Adult Crit Care & Emergency Med, Victoria, BC, Canada
[2] Victoria Gen Hosp, Victoria, BC, Canada
[3] Univ British Columbia, Dept Emergency Med, Vancouver, BC, Canada
[4] Montreal Childrens Hosp, Div Crit Care, Montreal, PQ, Canada
[5] McGill Univ, Dept Pediat, Montreal, PQ, Canada
[6] Canadian Blood Serv, Ottawa, ON, Canada