Faculty of Medicine, McGill University, Montreal, QC, Canada. stephen.yang@mail.mcgill.ca. Division of Critical Care, Department of Anesthesia, Jewish General Hospital, K1400-3755, Cote Sainte Catherine, Montreal, QC, H3T 1E2, Canada. stephen.yang@mail.mcgill.ca. Faculty of Medicine, McGill University, Montreal, QC, Canada. Division of Critical Care, Department of Anesthesia, Jewish General Hospital, K1400-3755, Cote Sainte Catherine, Montreal, QC, H3T 1E2, Canada.