1. Department of Urology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
2. Lineberger Comprehensive Cancer Center, Cancer Outcomes Research Group, Multidisciplinary Genitourinary Oncology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
3. Lineberger Comprehensive Cancer Center Biostatistics Core Facility, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
4. Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina