1. Department of Urology, Ludwig-Maximilians-University, Klinikum Grosshadern, Munich, Germany
2. Martini-Clinic Prostate Cancer Center and Department of Urology, University Hospital Hamburg-Eppendorf, Hamburg, Germany
3. Institute of Anatomy and Cell Biology, University of Würzburg, Würzburg, Germany
4. UroClinic Bogenhausen, Munich, Germany