1 Division of Emergency Medicine, Department of Family and Community Medicine, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada. sheldon.cheskes@sunnybrook.ca.
2 Sunnybrook Centre for Prehospital Medicine, Toronto, ON, Canada. sheldon.cheskes@sunnybrook.ca.
3 Division of Emergency Medicine, Department of Family and Community Medicine, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada.
4 Schwartz/Reisman Emergency Medicine Institute, Sinai Health, Toronto, ON, Canada.
5 Interdepartmental Division of Critical Care Medicine and Department of Medicine, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada.
6 Department of Critical Care Medicine, Sunnybrook Health Sciences Centre, Toronto, Canada.