1. Clinic of Radiation Oncology, Mersin Education and Research Hospital, Mersin, Turkey
2. Department of Radiation Oncology, Medical Faculty, Baskent University, Adana, Turkey
3. Department of Radiation Oncology, Suleyman Demirel University, Isparta, Turkey
4. Department of Radiation Oncology, Faculty of Medicine, Afyonkarahisar Health Sciences University, Afyonkarahisar, Turkey
5. Department of Radiation Oncology, Bahcesehir University, Istanbul, Turkey
6. Department of Radiation Oncology, School of Medicine, Koc University, Istanbul, Turkey
7. Division of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA