1 Division of Pulmonary and Critical Care Medicine, Department of Medicine, Johns Hopkins School of Medicine, 1830 E. Monument St, #504, Baltimore, MD, 21224, USA. ssahety1@jh.edu.
2 Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON, Canada.
3 Department of Medicine, Division of Critical Care, McMaster University, Hamilton, ON, Canada.
4 Interdepartmental Division of Critical Care Medicine, University Health Network and Sinai Health System, University of Toronto, Toronto, ON, Canada.