[1] Univ Toronto, Sunnybrook Hlth Sci Ctr, Sunnybrook Res Inst, Dept Crit Care Med, Toronto, ON, Canada
[2] Univ Toronto, Interdepartmental Div Crit Care, Toronto, ON, Canada
[3] McMaster Univ, Dept Clin Epidemiol & Biostat, Ctr Hlth Econ & Policy Anal, Hamilton, ON, Canada
[4] McMaster Univ, Dept Sociol, Hamilton, ON, Canada
[5] McMaster Univ, Dept Med, Hamilton, ON, Canada
[6] McMaster Univ, Dept Clin Epidemiol & Biostat, Hamilton, ON, Canada
[7] McMaster Univ, Sch Nursing, Hamilton, ON, Canada