1. OHSU Knight Cancer Institute, Oregon Health & Science University, Portland, Oregon, U.S.A
2. Department of Biomedical Engineering, Oregon Health & Science University, Portland, Oregon, U.S.A
3. Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington, U.S.A
4. The Vancouver Prostate Centre and Department of Urologic Sciences, University of British Columbia, Vancouver, British Columbia, Canada