1. Department of Urology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
2. Cancer Outcomes Research Group, Biostatistics and Clinical Data Management, Lineberger Comprehensive Cancer Center, Chapel Hill, North Carolina
3. Department of Urology, Northwestern University, Chicago, Illinois
4. Department of Urology, University of Wisconsin, Madison, Wisconsin
5. Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
6. Cancer Outcomes Research Group, Multidisciplinary Genitourinary Oncology, Lineberger Comprehensive Cancer Center, Chapel Hill, North Carolina