1 Department of Emergency Medicine, University of British Columbia Janelle Beaven, MD Department of Radiology, University of Calgary, Cumming School of Medicine, Canada.
2 University of Calgary Cumming School of Medicine, Calgary, Alberta, Canada.
3 Island Health, British Columbia, Canada.
4 University of Calgary Cumming School of Medicine, Calgary, Alberta, Canada; University of Alberta, Faculty of Medicine and Dentistry, Edmonton, Alberta, Canada.
5 Department of Community Health Science, Community Rehabilitation and Disability Studies, University of Calgary, Calgary, AB, Canada.
6 University of Alberta, Faculty of Medicine and Dentistry, Edmonton, Alberta, Canada.
7 Department of Emergency Medicine, Calgary, Alberta, Canada. Electronic address: stephanie.vandenberg@ucalgary.ca.