1. From the Departments of Urology and Obstetrics, Gynecology and Reproductive Sciences, University of California, School of Medicine, San Francisco, California, and Klinik und Poliklinik für Urologie, Westfälische Wilhelms-Universität Münster, Münster and Urologische Klinik and Poliklinik, Johannes-Gutenberg-University, Mainz, Germany