1. From the University of Texas Houston Health Science Center at Houston (OLW, RB-T), Department of Biostatistics, University of Texas –M.D. Anderson Cancer Center (JLP), Houston, the Department of Urology, Wilford Hall Medical Center, Lackland Air Force Base, San Antonio (RDC), Texas, and the University of Michigan, Department of Urology, Ann Arbor, Michigan (EJM)