1. Department of Urology and Pediatric Urology, University Medical Center RWTH Aachen, 52074 Aachen, Germany
2. Center for Integrated Oncology (CIO), University Hospital RWTH Aachen, 52074 Aachen, Germany
3. Department of Urology and Kidney Transplantation, Martin Luther University, 06097 Halle (Saale), Germany
4. Interdisciplinary Center for Clinical Research (IZKF), RWTH Aachen University, 52074 Aachen, Germany
5. Institute of Pathology, University Hospital RWTH Aachen, 52074 Aachen, Germany
6. Institute of Pathology, University Hospital Ulm, 89081 Ulm, Germany