1. Institute of Pathology, University Medical Centre Hamburg-Eppendorf, Hamburg, Germany;
2. General, Visceral and Thoracic Surgery Department and Clinic, University Medical Centre Hamburg-Eppendorf, Hamburg, Germany;
3. Martini-Clinic, Prostate Cancer Centre, University Medical Centre Hamburg-Eppendorf, Hamburg, Germany;
4. Department of Urology, Charité, Universitätsmedizin Berlin, Berlin, Germany