[1] McMaster Univ, Dept Med, Hlth Sci Ctr, Hamilton, ON L8N 3Z5, Canada
[2] McMaster Univ, Dept Clin Epidemiol & Biostat, Hamilton, ON L8N 3Z5, Canada
[3] Canadian Blood Serv, Hamilton, ON L9K 1S5, Canada
[4] Univ Laval, Div Crit Care, Dept Med, Quebec City, PQ G1V 0A6, Canada
[5] Univ Laval, Div Crit Care, Dept Anesthesiol, Quebec City, PQ G1V 0A6, Canada
[6] Ctr Hosp Affilie Univ Quebec, Ctr Rech FRSQ, Quebec City, PQ G1J 1Z4, Canada
[7] St Josephs Healthcare, Hamilton, ON L8N 4A6, Canada