1. Department of Radiation Oncology, MediClin Robert Janker Klinik, 53129 Bonn, Germany
2. Department of Urology, MediClin Robert Janker Klinik, 53129 Bonn, Germany
3. Urologic Centre Bonn, 53111 Bonn, Germany
4. Curos Urologic Centre, 50389 Wesseling, Germany