1. Division of Urology, Department of Surgery, University of California San Diego School of Medicine, San Diego, CA 92103, USA
2. James Buchanan Brady Urological Institute, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
3. Department of Urology, University of Florida College of Medicine, Gainesville, FL 32610, USA
4. Division of Urologic Oncology, Moores UCSD Cancer Center, 3855 Health Sciences Drive, 0987 La Jolla, CA 92093, USA