1. Division of Urology, Department of Surgery, The University of Texas Medical Branch at Galveston
2. Urology Section, Department of Surgery, Durham Veterans Affairs Medical Center, Durham, North Carolina
3. Duke Cancer Institute Biostatistics Shared Resource, Durham, North Carolina
4. Division of Epidemiology, Department of Medicine, Sealy Center on Aging, The University of Texas Medical Branch at Galveston
5. Department of Surgery, The University of Texas Medical Branch at Galveston
6. Section of Urology, Augusta University, Augusta, Georgia
7. Section of Urology, Charlie Norwood Veterans Affairs Medical Center, Augusta, Georgia
8. Department of Urology, Cedars-Sinai Medical Center, Los Angeles, California