1. Ottawa Hospital Research Institute, Ottawa, ON K1Y 4E9, Canada
2. Department of Surgery, University of Ottawa, Ottawa, ON K1H 8L6, Canada
3. Department of Epidemiology, Biostatistics and Occupational Health, School of Population and Global Health, McGill University, Montreal, QC H3A 1G1, Canada
4. Colorectal Cancer Canada, Montreal, QC H3Z 2P9, Canada