1Canadian Partnership against Cancer, Toronto, ON, Canada
2Département médecine sociale et préventive, Université Laval, Quebec, QC, Canada
3Division of Gastroenterology, McMaster University Medical Centre, Hamilton, ON, Canada
4Departments of Community Health Sciences and Oncology, University of Calgary, Calgary, AB, Canada
5Division of Medical Oncology, BC Cancer Agency, and Department of Medicine, University of British Columbia, Vancouver, BC, Canada
6Cancercare Manitoba and University of Manitoba, Winnipeg, MB, Canada
7Breast Screening Program for Newfoundland and Labrador, St. John's, NL, Canada
8Department of Pathology and Laboratory Medicine Western University, London, ON, Canada
9Department of Diagnostic Radiology, Dalhousie University, and Nova Scotia Breast Screening Program, Halifax, NS, Canada