1. Institute of Medical Virology, University Hospital Frankfurt, D-60596 Frankfurt am Main, Germany
2. Department of Urology, University Hospital Frankfurt, D-60596 Frankfurt am Main, Germany
3. Dr. Senckenberg Institute of Pathology, University Hospital Frankfurt, D-60596 Frankfurt am Main, Germany
4. School of Biosciences, University of Kent, Canterbury CT2 7NZ, UK
5. Department of Urology, University Hospital Ulm, D-89081 Ulm, Germany