1. Department of Medicine, Division of Cardiology Dalhousie University Halifax Nova Scotia Canada
2. Department of Medicine, Division of Cardiology King Abdulaziz University Jeddah Saudi Arabia
3. Department of Medicine, Division of Nephrology Dalhousie University Halifax Nova Scotia Canada
4. Research Methods Unit Nova Scotia Health Authority Halifax Nova Scotia Canada
5. Department of Surgery, Division of Cardiac and Vascular Surgery Dalhousie University Halifax Nova Scotia Canada