1. School of Population and Public Health, University of British Columbia, Vancouver, British Columbia, Canada
2. Cancer Control Research, British Columbia Cancer Agency, Vancouver, British Columbia, Canada
3. Department of Environmental and Occupational Health, Université de Montreal, Montreal, Québec, Canada
4. University of Montreal Hospital Research Center (CRCHUM), Montreal, Québec, Canada
5. Department of Environmental and Occupational Health, School of Public Health, Drexel University, Philadelphia, Pennsylvania
6. Department of Epidemiology and Biostatistics, School of Public Health, Drexel University, Philadelphia, Pennsylvania