1. The University of Ottawa Heart Institute; Division of Cardiac Anesthesiology, Department of Anesthesia; 40 Ruskin St Ottawa ON Canada K1Y 4W7
2. Queen's University; The Department of Family Medicine; Kingston ON Canada
3. Sunnybrook and Women's College Health Sciences Centre; Emergency Department; Toronto ON Canada
4. University of Ottawa; Department of Epidemiology and Community Medicine; Room H1281 40 Ruskin Street Ottawa ON Canada K1Y 4W7
5. The Ottawa Hospital; Clinical Epidemiology Programme; 1053 Carling Avenue F6 Clinical Epidemiology Programme Ottawa ON Canada K1Y 4E9