1. Institute of Pathology, Charité Berlin, Berlin, Germany
2. Department of Urology, Charité Berlin, Berlin, Germany
3. Institute of Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
4. Department of Pathology, Academic Hospital Fuerth, Fuerth, Germany
5. Department of Urology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
6. Department of Urology, Marienhospital Hamburg, Hamburg, Germany
7. Department of Urology and Urological Oncology, Pomeranian Medical University, Szczecin, Poland
8. Department of Urology, Helios Hospital Bad Saarow, Bad Saarow, Germany
9. Department of Pathology, Helios Hospital Bad Saarow, Bad Saarow, Germany
10. Department of Urology, Albertinen Hospital, Hamburg, Germany