[1] St Justine Univ Hosp, Div Pediat intens Care Unit, Dept Pediat, Montreal, PQ, Canada
[2] Univ Montreal, Montreal, PQ, Canada
[3] Univ Pittsburgh, Dept Surg, Pittsburgh, PA USA
[4] Univ Pittsburgh, Dept Crit Care Med, Pittsburgh, PA USA
[5] Ctr Hosp Univ St Justine, Unite Rech Clin Appl URCA, Montreal, PQ, Canada
[6] Ottawa Hosp Res Inst, Clin Epidemiol Program, Ottawa, ON, Canada
[7] Univ Alberta, Dept Surg, Edmonton, AB, Canada
[8] Univ Montreal, Montreal Heart Inst, CHU St Justine, Dept Cardiac Surg, Montreal, PQ, Canada
[9] Univ Alberta, Stollery Childrens Hosp, Dept Pediat, Dept Pediat Cardiac Intens Care, Edmonton, AB, Canada
[10] Univ Minnesota, Div Hematol Oncol & Crit Care, Dept Pediat, Minneapolis, MN USA
[11] Leiden Univ Hosp, Dept Intens Care, Pediat Intens Care Unit, Leiden, Netherlands