1. Urologic Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
2. Department of Urology, George Washington University Medical School, Washington, District of Columbia
3. Department of Urology, MedStar Georgetown University Hospital, Washington, District of Columbia
4. Department of Urology, SUNY Upstate Medical Center, Syracuse, New York
5. Division of Urology, Department of Surgery, Howard University College of Medicine, Washington, District of Columbia