1. Department of Urology, University Hospital of Cologne, Kerpenerstr. 62, D-50937 Cologne, Germany
2. Department of Urology, Stanford University, Stanford, CA 94305, USA
3. Department of Pathology, University Hospital of Cologne, Kerpenerstr. 62, D-50937 Cologne, Germany
4. Laboratory for Molecular Oncology, University Hospital of Cologne, Kerpener Strasse 62, D-50937 Cologne, Germany
5. Department of Pathology, University Hospital of Muenster, Albert-Schweitzer-Campus 1, D- 48149 Muenster, Germany