1. Department of Urology, University of North Carolina, Chapel Hill, Chapel Hill, North Carolina
2. Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, Chapel Hill, North Carolina
3. School of Medicine, University of North Carolina, Chapel Hill, Chapel Hill, North Carolina
4. Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, Chapel Hill, North Carolina
5. Department of Surgery, Stanford University, Stanford, California
6. Department of Internal Medicine, Division of Oncology, University of North Carolina, Chapel Hill, Chapel Hill, North Carolina