Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Quebec, Canada.|Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Quebec, Canada.|Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Quebec, Canada.|Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Quebec, Canada.|Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Quebec, Canada.