Mikkel Fode1,2, Giorgio I Russo3, Maarten Albersen4. 1. Department of Urology, Zealand University Hospital, Roskilde, Denmark. mimf@regionsjaelland.dk. 2. Department of Urology, Herlev and Gentofte Hospital, Herlev, Denmark. mimf@regionsjaelland.dk. 3. Urology Section, Department of Surgery, University of Catania, Catania, Italy. 4. Department of Urology, University Hospitals, Leuven, Belgium.