1. From the Minneapolis VA Medical Center, University of Minnesota Cancer Center, and Departments of Laboratory Medicine and Pathology, Urologic Surgery, Cell Biology and Neuroanatomy, Obstetrics and Gynecology, Genetics and Cell Biology, and Radiology, University of Minnesota, Minneapolis, the Department of Urology, St. Paul Ramsey Medical Center, St. Paul, Minnesota, and the Urologic Research Centre, University of Western Australia, Nedlands, Australia