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