1 Department of Radiotherapy and Radiation Oncology, University Hospital Ulm, Albert-Einstein-Allee 23, 89081, Ulm, Germany. thomas.wiegel@uniklinik-ulm.de.
2 Department of Urology, University Hospital Düsseldorf, Düsseldorf, Germany.
3 Department of Radiotherapy and Radiation Oncology, University Hospital Ulm, Albert-Einstein-Allee 23, 89081, Ulm, Germany.
4 PREFERE Project Management, German Cancer Society, Berlin, Germany.
5 Department of Medical Psychology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
6 Institute of Pathology, University Hospital Bonn, Bonn, Germany.
7 Department of Clinical Epidemiology and Applied Biostatistics, University Hospital Tübingen, Tübingen, Germany.
8 Department of Medical Biostatistics, Epidemiology and Informatics, University of Mainz, Mainz, Germany.
9 Department of Radiotherapy and Radiation Oncology, University Hospital Mainz, Mainz, Germany.
10 Department of Urology, Klinikum Leverkusen, Leverkusen, Germany.
11 Center for Urology, Lübeck, Germany.
12 Department of Urology, Klinikum Lippe Detmold, Detmold, Germany.
13 Department of Urology, Vinzenzkrankenhaus, Hannover, Germany.
14 Department of Urology, University Hospital Homburg/Saar, Homburg, Germany.