1. Centre for Clinical Epidemiology and Evaluation; University of British Columbia; Vancouver General Hospital; Vancouver BC Canada
2. Vancouver Prostate Centre; Gordon and Leslie Diamond Health Care Centre, Vancouver General Hospital; Vancouver BC Canada
3. School of Population and Public Health; Faculty of Medicine; University of British Columbia; Vancouver BC Canada
4. Department of Urologic Sciences; Faculty of Medicine; University of British Columbia; Vancouver BC Canada
5. Seattle Cancer Care Alliance; University of Washington; Seattle WA USA