1. South Texas Urology and Urologic Oncology, San Antonio, Texas, Uro-Surg Associates, Plantation, South County Urology, P. A., Delray Beach and Ameripath-Center for Advanced Diagnostics, Orlando, Florida, Urology Resource Centre, Burlington, Toronto Urology Study Group/CMX, Toronto, and Richmond Hill Urology and Prostate Institute, Richmond Hill, Ontario, Canada, University of Nebraska Medical Center, Omaha, Nebraska, and University of Kansas Medical Center, Kansas City, Kansas