1. Queen's University; Department of Emergency Medicine; Kingston General Hospital, 76 Stuart Street Empire 3 Kingston Ontario Canada K7L 2V7
2. Queen's University; School of Medicine; Kingston, Ontario Canada
3. St Michael's Hospital and the University of Toronto; Rescu, Keenan Research Centre, Li Ka Shing Knowledge Institute; 30 Bond Street Toronto Ontario Canada M5B1W8
4. Division of Emergency Medicine, Department of Medicine, University of Toronto; Rescu, Keenan Research Centre, Li Ka Shing Knowledge Institute; 30 Bond St Toronto Ontario Canada M5B 1W8