Juenemann K1, Hessdoerfer E2, Unamba-Oparah I3, Berse M4, Bruenjes R5, Madersbacher H6, Gramatté T5 1. Dept. Urology, University Hospital Kiel, Germany, 2. Dept. Urology, Berlin, Germany, 3. Dept. Urology, Voerde, Germany, 4. Dept. Urology, Duisburg, Germany, 5. APOGEPHA Dresden, Germany, 6. Neurourology Unit, University Hospital of Innsbruck, Austria