[1] McMaster Univ, Dept Med, Hamilton, ON L8S 4K1, Canada
[2] McMaster Univ, Dept Clin Epidemiol & Biostat, Hamilton, ON L8S 4K1, Canada
[3] Univ Toronto, Div Crit Care Med, Toronto, ON, Canada
[4] Univ Toronto, Div Palliat Care, Toronto, ON, Canada
[5] Univ Toronto, Sunnybrook Hlth Sci Ctr, Dept Crit Care Med, Toronto, ON, Canada
[6] Univ Toronto, Sunnybrook Hlth Sci Ctr, Dept Med, Toronto, ON, Canada
[7] Univ Sherbrooke, Clin Hop Univ Sherbrooke, Ctr Rech, Sherbrooke, PQ J1K 2R1, Canada
[8] Univ Calgary, Dept Med, Calgary, AB, Canada
[9] McGill Univ, Dept Internal Med, Montreal, PQ, Canada
[10] Univ Saskatchewan, Coll Nursing, Saskatoon, SK, Canada
[11] McMaster Univ, Sch Nursing, Hamilton, ON L8S 4K1, Canada
[12] Queens Univ, Dept Med, Kingston, ON K7L 3N6, Canada
[13] Queens Univ, Crit Care Program, Kingston, ON, Canada
[14] Univ British Columbia, Div Gen Internal Med, Vancouver, BC V5Z 1M9, Canada
[15] Mem Univ Newfoundland, Fac Med, St John, NF, Canada
[16] Queens Univ Belfast, Sch Nursing & Midwifery, Belfast, Antrim, North Ireland
[17] Univ Manitoba, Fac Med, Winnipeg, MB, Canada
[18] Univ Montreal, Dept Med, Hop Sacre Coeur Montreal, Ctr Rech, Montreal, PQ H3C 3J7, Canada
[19] Univ Calgary, Dept Crit Care Med, Calgary, AB, Canada
[20] Univ Calgary, Div Palliat Med, Calgary, AB, Canada
[21] Kingston Gen Hosp, Dept Med, Clin Evaluat Res Unit, Kingston, ON K7L 2V7, Canada
[22] Queens Univ, Dept Community Hlth & Epidemiol, Kingston, ON, Canada