1 Department of Emergency Medicine, The Ottawa Hospital, Civic Campus, University of Ottawa, 1053 Carling Ave., Ottawa, ON, K1Y 4E9, Canada. anath@toh.ca.
2 Department of Family and Community Medicine, University of Toronto, Toronto, ON, Canada.
3 Department of Academic Family Medicine, University of Saskatchewan, Regina, SK, Canada.
4 Department of Emergency Medicine, University of Calgary, Calgary, AB, Canada.
5 Division of Emergency Medicine, Department of Family Medicine, McMaster University, Hamilton, ON, Canada.
6 Discipline of Emergency Medicine, Faculty of Medicine, Memorial University, St. John's, NL, Canada.