1. Institute of Pathology; University Hospital of Bonn; Bonn Germany
2. Department of Urology; University Hospital of Cologne; Cologne Germany
3. Gerhard-Domagk Institute of Pathology; University Hospital Münster; Münster Germany
4. Institute of Pathology and Cytology; Schüttorf Germany
5. Institute of Pathology; Saarbrücken Germany
6. Hannover Medical School; Institute of Pathology; Hannover Germany
7. Prostate Center; University Hospital Münster; Münster Germany