1. Department of Radiation Oncology, Adana Dr. Turgut Noyan Research and Treatment Center, Baskent University Faculty of Medicine, Adana, Turkey
2. Department of Radiation Oncology, Başkent University Faculty of Medicine, Ankara, Turkey
3. Department of Radiation Oncology, Hacettepe University Faculty of Medicine, Ankara, Turkey
4. Division of Radiation Oncology, Iskenderun Gelisim Hospital, Iskenderun, Turkey