1. Department of Surgery, Urology Division, Huntsman Cancer Institute, University of Utah, Salt Lake City, Utah
2. Department of Epidemiology and Biostatistics, Memorial Sloan-Kettering Cancer Center, New York, New York
3. Urology Service, Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York, New York
4. Department of Urology, Weill Medical College of Cornell University, New York, New York