1 Department of Medicine, Division of Emergency Medicine, Toronto General Hospital, University of Toronto, Toronto, ON, Canada. Jennifer.Bryan@utoronto.ca.
2 Department of Medicine, Division of Emergency Medicine, Toronto General Hospital, University of Toronto, Toronto, ON, Canada.
3 Department of Emergency Medicine, University of Calgary, Calgary, AB, Canada.
4 Department of Emergency Medicine, Memorial University of Newfoundland, St. John's, NL, Canada.
5 Department of Emergency Medicine, University of British Columbia, Vancouver, BC, Canada.
6 Department of Emergency Medicine, McGill University, Montreal, QC, Canada.
7 Departments of Family Medicine, McGill University and University of Ottawa, Ottawa, ON, Canada.
8 Department of Emergency Medicine, Dalhousie University, Halifax, NS, Canada.