1. Institute of Pathology; University Medical Center Hamburg-Eppendorf; Germany
2. Martini-Clinic, Prostate Cancer Center; University Medical Center Hamburg-Eppendorf; Germany
3. Department of Urology, Section for Prostate Cancer Research; University Medical Center Hamburg-Eppendorf; Germany
4. Department of Urology; Charité Universitätsmedizin Berlin; Berlin Germany