1. Department of Medicine University of British Columbia Vancouver Canada
2. Centre for Clinical Epidemiology & Evaluation (C2E2) Vancouver Canada
3. Centre for Health Evaluation & Outcome Sciences (CHÉOS) Vancouver Canada
4. Centre for Health Services and Policy Research (CHSPR), School of Population and Public Health University of British Columbia Vancouver Canada
5. Ottawa Hospital Research Institute (OHRI) Ottawa Canada
6. Department of Medicine University of Ottawa Ottawa Canada
7. Institute for Clinical Evaluative Sciences Toronto Canada