1. Faculty of Medicine University of Ottawa Ottawa Canada
2. C.T. Lamont Primary Health Care Research Centre Bruyere Research Institute Ottawa Canada
3. Bruyere Research Institute, School of Epidemiology Public Health and Preventive Medicine Ottawa Canada
4. Faculty of Medicine, School of Epidemiology and Public Health University of Ottawa Ottawa Canada
5. Department of Epidemiology, C.T. Lamont Primary Care Research Centre, Bruyere Research Institute University of Ottawa Ottawa Canada
6. Clinical Epidemiology Program Ottawa Hospital Research Institute Ottawa Canada
7. Family Medicine University of Ottawa Ottawa Canada