1. Department of Community Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
2. CancerCare Manitoba Research Institute, CancerCare Manitoba, Winnipeg, Manitoba, Canada
3. Department of Epidemiology and Cancer Registry, CancerCare Manitoba, Winnipeg, Manitoba, Canada
4. Public Health Agency of Canada, Ottawa, Ontario, Canada
5. Department of Internal Medicine, University of Manitoba, Winnipeg, Manitoba, Canada