1. Radiation Medicine Program, Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
2. Department of Radiation Oncology, University of Toronto, Toronto, Ontario, Canada
3. Hospital Sirio-Libanes, São Paulo, Brazil
4. Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
5. Department of Biostatistics, Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
6. Division of Urology, Department of Surgical Oncology, Princess Margaret Cancer Centre, University Health Network, University of Toronto, Toronto, Ontario, Canada
7. Department of Urology, University of Michigan, Ann Arbor, Michigan
8. Department of Radiation Oncology, University of Michigan, Ann Arbor, Michigan
9. Department of Pathology, University of Michigan, Ann Arbor, Michigan
10. Department of Radiation Oncology, Cedars-Sinai Medical Center, Los Angeles
11. Department of Urology, University of California-San Francisco, San Francisco, California