1. The International Continence Society “Benign Prostatic Hyperplasia” Study Group; From the Department of Social Medicine, University of Bristol and Bristol Urological Institute, Southmead Hospital, Bristol, United Kingdom, Department of Urology, University Hospital Nijmegen, Nijmegen, The Netherlands, Clinica Urologica, Ospedale SS. Trinita, Cagliari, Italy, and Department of Adult and Pediatric Urology, University of Witten/Herdecke, Wuppertal, Germany