[1] Sunnybrook Hlth Sci Ctr, Dept Crit Care Med, Toronto, ON M4N 3M5, Canada
[2] Univ Toronto, Lawrence S Bloomberg Fac Nursing, Toronto, ON M5T 1P8, Canada
[3] Mt Sinai Hosp, Dept Pharm & Med, Toronto, ON M5G 1X5, Canada
[4] Univ Toronto, Toronto, ON, Canada
[5] Ottawa Hosp Res Inst, Clin Epidemiol Program, Ottawa, ON K1Y 4E9, Canada
[6] Univ Ottawa, Fac Med, Ottawa, ON, Canada
[7] St Josephs Healthcare, Hamilton, ON L8N 4A6, Canada
[8] McMaster Univ, Dept Med, Hamilton, ON, Canada
[9] McMaster Univ, Dept Clin Epidemiol & Biostat, Hamilton, ON, Canada
[10] St Pauls Hosp, Div Crit Care Med, Vancouver, BC V6Z 1Y6, Canada
[11] St Pauls Hosp, Ctr Hlth Evaluat & Outcome Sci, Vancouver, BC V6Z 1Y6, Canada
[12] Univ British Columbia, Vancouver, BC V6Z 1Y6, Canada
[13] St Michaels Hosp, Dept Crit Care, Toronto, ON M5B 1W8, Canada
[14] Interdepartmental Div Crit Care Med, Toronto, ON, Canada
[15] Li Ka Shing Inst, Toronto, ON, Canada
[16] Univ Hlth Network, Div Respirol, Dept Med, Toronto, ON M5G 2C4, Canada
[17] Gen Res Inst, Toronto, ON M5G 2C4, Canada
[18] Univ Toronto, Inst Hlth Policy Management & Evaluat, Interdepartmental Div Crit Care Med, Toronto, ON, Canada
[19] Univ Toronto, Dept Med, Inst Hlth Policy Management & Evaluat, Toronto, ON, Canada
[20] Univ Toronto, Inst Hlth Policy Management & Evaluat, Dept Physiol, Toronto, ON, Canada
[21] Univ Hlth Network, Crit Care & Pulm Med, Toronto, ON M5G 2C4, Canada
[22] Univ Toronto, Interdepartmental Div Crit Care Med, Toronto, ON, Canada
[23] Northeastern Univ, Sch Pharm, Boston, MA 02115 USA
[24] Mt Sinai Hosp, Toronto, ON M5G 1X5, Canada
[25] Royal Columbia Hosp, Div Crit Care, Dept Crit Care, New Westminster, BC V3L 3W7, Canada
[26] Univ British Columbia, Vancouver, BC V5Z 1M9, Canada
[27] Long Beach Mem Med Ctr, Dept Med, Long Beach, CA 90806 USA
[28] Sunnybrook Hlth Sci Ctr, Dept Med, Toronto, ON M4N 3M5, Canada
[29] Univ Alberta Hosp, Dept Anesthesiol, Edmonton, AB T6G 2B7, Canada
[30] Univ Manitoba, Dept Med, Sect Crit Care, Winnipeg, MB R3T 2N2, Canada
[31] McGill Univ, Dept Med, Montreal, PQ H3G 2M1, Canada
[32] Mt Sinai Hosp, Dept Med, Toronto, ON M5G 1X5, Canada
[33] Mt Sinai Hosp, Interdepartmental Div Crit Care Med, Toronto, ON M5G 1X5, Canada