1. Division of Cardiology St. Michael's Hospital Toronto Canada
2. Keenan Research Centre Li Ka Shing Knowledge Institute St. Michael's Hospital Toronto Canada
3. Institute of Health Policy, Management and Evaluation Faculty of Medicine University of Toronto Canada
4. Division of Emergency Medicine Department of Medicine Rescu Li Ka Shing Knowledge Institute St. Michael's Hospital University of Toronto Canada
5. Department of Medicine University of Toronto Ontario Canada
6. Institute for Clinical and Evaluative Sciences Sunnybrook Health Sciences Centre Toronto Canada