1. Department of Urology, Carl-Thiem Hospital, Cottbus, Germany
2. Institute of Medical Psychology, Charité – Universitätsmedizin Berlin, Germany
3. Department of Urology, Vivantes-Clinic Am Urban, Berlin, Germany
4. Department of Urology, Bethanien-Clinic, Chemnitz, Germany
5. Department of Urology, Vivantes-Clinic im Friedrichshain, Berlin, Germany
6. Departments of Andrology and Urology, University Hospital, Cologne, Germany