1. Clinic of Urology, University Hospital Ulm, Ulm, Germany
2. Clinic of Urology, University Hospital Muenster, Muenster, Germany
3. Institute of Pathology and Molecular Pathology, Bundeswehrkrankenhaus Ulm, Ulm, Germany
4. Massachusetts General Hospital/Harvard Medical School, Boston, MA, USA
5. Gerhard-Domagk Institute of Pathology, University of Muenster, Muenster, Germany