1. Centre for Outcomes Research and Evaluation, Research Institute of McGill University Health Centre, Montreal, Canada
2. Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Canada
3. Division of Cardiology, McGill University Health Centre, Montreal, Canada
4. Division of General Internal Medicine, McGill University Health Centre, 1001 Decarie Boulevard, Montreal, Quebec H4A 3JI, Canada