1. Department of Psychoéducation, Université de Montréal, Montréal, Québec, Canada.
2. Oral Health and Society Research Unit, Faculty of Dentistry, McGill University, Montreal, Quebec, Canada.
3. Department of Medicine and Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Quebec, Canada.
4. Centre for Clinical Epidemiology, Jewish General Hospital, Montreal, Quebec, Canada.