1. Department of Urologic Oncology, University of Colorado Health Sciences Center, Denver, Colorado, Washington, D. C.
2. Division of Cancer Prevention, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Washington, D. C.
3. University of California Los Angeles Tissue Typing Laboratory, Los Angeles, California
4. Office of Disease Prevention, National Institutes of Health, Bethesda, Maryland
5. Division of Urology, Washington University, St. Louis, Missouri
6. Marshfield Medical Research and Education Foundation, Marshfield, Wisconsin
7. Lombardi Cancer Research Center, Georgetown University, Washington, D. C.