1. From the Department of Radiation Oncology, Brigham and Women’s Hospital and Dana Farber Cancer Institute (AVDA), Boston, Massachusetts, Department of Surgery and Urology Service, Center for Prostate Disease Research, Uniformed Services University and Walter Reed Army Medical Center (JM, LS), Washington, D. C., Department of Urology, University of California-San Francisco (PRC, DL), San Francisco, California, and Department of Statistics, University of Connecticut (M-HC), Storrs, Connecticut