1. Department of Urology, University Hospital Heidelberg, Heidelberg, Germany
2. Department of Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
3. Department of Urology, University Hospital Bern, Bern, Switzerland
4. Department of Diagnostic and Interventional Radiology, University Hospital Heidelberg, Heidelberg, Germany
5. Department of Pathology, University Hospital Heidelberg, Heidelberg, Germany