1. CHU de Québec Research Centre, Quebec City, Canada (MMBP, MM, FL)
2. Department of Family Medicine and Emergency Medicine, Université Laval, Quebec City, Canada (MM, FL)
3. Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, Canada (JB)
4. School of Epidemiology, Public Health and Preventive Medicine, University of Ottawa, Ottawa, Canada (JB)