Ilan Gruenwald1, Maarten Albersen2. 1. Neuro-Urology Unit, Rambam Medical Center, Haifa & Rappaport School of Medicine, Technion, Haifa, Israel. i_gruenwald@rambam.health.gov.il. 2. Department of Urology, University Hospitals Leuven, Belgium & University of Leuven, Leuven, Belgium.