1. Department of Urology, Koc University School of Medicine, Istanbul, Turkey
2. Department of Radiation Oncology, Moffitt Cancer Center, Tampa, FL
3. Department of Radiation Oncology, Koc University School of Medicine, Istanbul, Turkey
4. Department of Urology, University Hospital Hamburg-Eppendorf, Hamburg, Germany
5. Martini-Klinik Prostate Cancer Center, University Hospital Hamburg-Eppendorf, Hamburg, Germany