1. Department of Urology Federal Armed Services Hospital Ulm Ulm Germany
2. Department of Urology University Hospital of Cologne Cologne Germany
3. Department of Urology University Hospital of Duesseldorf Duesseldorf Germany
4. Department of Oncology, Hematology and Bone Marrow Transplantation with Division of Pneumology University Medical Center Hamburg‐Eppendorf, University Hospital of Hamburg‐Eppendorf Hamburg Germany
5. Department of Urology and Pediatric Urology University Medical Centre Homburg, Saarland University Hospital of Homburg Homburg Germany
6. Department of Urology Federal Armed Services Hospital Koblenz Koblenz Germany
7. Department of Urology Federal Armed Services Hospital Hamburg Hamburg Germany
8. Department of Urology Medical University Vienna Vienna Austria
9. Division of Oncology Medical University of Graz Austria