[1] McMaster Univ, Dept Pediat, Hamilton, ON, Canada
[2] McMaster Univ, Dept Hlth Res Methods Evidence & Impact, Hamilton, ON, Canada
[3] Johns Hopkins Univ, Sch Med, Dept Anesthesiol & Crit Care Med, Baltimore, MD 21205 USA
[4] Univ Montreal, Dept Pediat, CHU St Justine, Montreal, PQ, Canada
[5] McGill Univ, Dept Pediat, Montreal, PQ, Canada
[6] Univ Calgary, Fac Nursing, Calgary, AB, Canada
[7] Univ Toronto, Dept Crit Care Med, Toronto, ON, Canada
[8] Univ Toronto, Dept Paediat, Toronto, ON, Canada
[9] Univ Alberta, Dept Pediat, Edmonton, AB, Canada
[10] Dalhousie Univ, Dept Crit Care, Halifax, NS, Canada
[11] Western Univ, Dept Pediat, London, ON, Canada
[12] Childrens Hosp Eastern Ontario, Dept Pediat, Ottawa, ON, Canada
[13] Univ British Columbia, Dept Pediat, Vancouver, BC, Canada
[14] Queens Univ, Kingston Hlth Sci Ctr, Dept Pediat, Kingston, ON, Canada
[15] Univ Laval, Dept Pediat, Fac Med, Quebec City, PQ, Canada
[16] Johns Hopkins Univ, Sch Med, Dept Pediat, Baltimore, MD 21205 USA
[17] Johns Hopkins Univ, Sch Med, Dept Phys Med & Rehabil, Baltimore, MD USA