1. Department of Medicine, University of Calgary, Calgary, Alberta, Canada
2. School of Population and Public Health, University of British Columbia, Vancouver, British Columbia, Canada
3. Leeds, Greenville and Lanark District Health Unit, Brockville, Ontario, Canada
4. Division of Cancer Care and Epidemiology, Queen’s University Cancer Research Institute, Kingston, Ontario, Canada
5. Department of Oncology, Queen’s University, Kingston, Ontario, Canada
6. Department of Public Health Sciences, Queen’s University, Kingston, Ontario, Canada