Department of Radiation Oncology, Centre Hospitalier de l'Université de Montréal (CHUM), Montreal, Quebec, Canada. cynthia.menard@umontreal.ca. Department of Oncology, London Health Sciences Centre, Western University, London, ON, Canada. Departments of Medicine and Radiology, McMaster University, Hamilton, ON, Canada. Department of Medical Imaging, Western University, London, ON, Canada. Department of Radiology, University of British Columbia, Vancouver, BC, Canada. Department of Surgery (Urology), Princess Margaret Cancer Centre, University of Toronto, Toronto, ON, Canada. Department of Radiology, British Columbia Cancer Agency, University of British Columbia, Vancouver, BC, Canada. Department of Oncology, Tom Baker Cancer Centre, University of Calgary, Calgary, AB, Canada. Institute for Health Economics, University of Alberta, Edmonton, AB, Canada. Department of Radiation Oncology, Centre Hospitalier de l'Université de Montréal (CHUM), Montreal, Quebec, Canada. Department of Oncology, Kingston Regional Cancer Centre, Queen's University, Kingston, ON, Canada. CHUM Center for the Integration and Analysis of Medical Data (CITADEL), Quebec, Canada.