1. Department of Radiation Oncology, Rush University Medical Center, Chicago, IL 60612, USA
2. Department of Epidemiology, Usher Institute, The Edinburgh University, Edinburgh EH16 4SS, UK
3. Department of Population and Quantitative Health Sciences, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA
4. Department of Urology, Mount Sinai Hospital and University Health Network, University of Toronto, Toronto, ON M5G 1X5, Canada
5. Department of Radiation Oncology, University of California Los Angeles, Los Angeles, CA 90095, USA
6. Division of Radiation Oncology, The Ottawa Hospital Cancer Centre, University of Ottawa, Ottawa, ON K1H 8L6, Canada
7. Department of Radiation Oncology, University Hospital Seidman Cancer Center, Case Western Reserve University, Cleveland, OH 44106, USA
8. Department of Surgery, Université de Montréal, Montreal, QC H2X 0A9, Canada