Mikkel Fode1, Christian Fuglesang S Jensen2, Peter B Østergren3. 1. Department of Urology, Zealand University Hospital, Roskilde, Denmark; Faculty of Health and Medical Science, University of Copenhagen, Copenhagen, Denmark. Electronic address: mimf@regionsjaelland.dk. 2. Department of Urology, Herlev and Gentofte Hospital, Herlev, Denmark. 3. Department of Urology, Zealand University Hospital, Roskilde, Denmark.