1. Department of Urology, Roswell Park Cancer Institute, Buffalo, New York
2. Department of Cancer Prevention and Population Sciences, Roswell Park Cancer Institute, Buffalo, New York
3. Department of Biostatistics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
4. Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
5. Department of Biostatistics, Roswell Park Cancer Institute, Buffalo, New York