1. 1Faculty of Medicine, University of Montreal, Montreal, Quebec, Canada.
2. 2University of Montreal Hospital Research Centre, Montreal, Quebec, Canada.
3. 3Faculty of Medicine, McGill University, Montreal, Quebec, Canada.
4. 4Institut national de santé publique du Québec, Montreal, Quebec, Canada.
5. 5Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Quebec, Canada.
6. 6Department of Social and Preventive Medicine, School of Public Health, University of Montreal, Montreal, Quebec, Canada.