1 Interdepartmental Division of Critical Care Medicine, University of Toronto; and Department of Medicine, Hôpital Maisonneuve-Rosemont, Université de Montréal, Montréal, QC, Canada.
2 Interdepartmental Division of Critical Care Medicine, University of Toronto; and Department of Medicine, Hôpital Maisonneuve-Rosemont, Université de Montréal, Montréal, QC, Canada. Electronic address: eddy.fan@uhn.ca.