1. Department of Urology, University Hospital Düsseldorf, Heinrich-Heine University Medical Faculty, Düsseldorf, Germany
2. Unit of Urology, Division of Oncology, Department of Urology, Istituto di Ricerca Urologica, Istituto di Ricovero e Cura a Carattere Scientifico Ospedale San Raffaele, Milan, Italy
3. Department of Pathology, University Hospital Düsseldorf, Heinrich-Heine University Medical Faculty, Düsseldorf, Germany
4. Department of Diagnostic and Interventional Radiology, University Hospital Düsseldorf, Heinrich-Heine University Medical Faculty, Düsseldorf, Germany