1 Department of Urology and Pediatric Urology, University Medical Center, Johannes Gutenberg University, Langenbeckstr. 1, 55131, Mainz, Germany. igor.tsaur@unimedizin-mainz.de.
2 Department of Urology and Pediatric Urology, University Medical Center, Johannes Gutenberg University, Langenbeckstr. 1, 55131, Mainz, Germany.
3 Department of Urology, CHU-Institut Universitaire du Cancer Toulouse-Oncopole, Toulouse, France.
4 Department of Urology, La Croix du Sud Hospital, Toulouse, France.