Katie Lin1, Kenneth Chan1, Rohit Mohindra2, Ken Milne3, Brent Thoma4, Chris Bond1. 1. *Department of Emergency Medicine,University of Calgary,Calgary,AB. 2. †Department of Emergency Medicine,McGill University,Montreal,QC. 3. ‡Division of Emergency Medicine,University of Western Ontario,London,ON. 4. §Emergency Medicine,University of Saskatchewan,Saskatoon,SK.