1. Baskent University Medical Faculty, Department of Radiation Oncology, Adana, Turkey
2. Mersin City Hospital, Radiation Oncology Clinics, Mersin, Turkey
3. Baskent University Medical Faculty, Department of Medical Oncology, Adana, Turkey
4. Koc University, School of Medicine, Department of Radiation Oncology, Istanbul, Turkey
5. The University of Texas MD Anderson Cancer Center, Department of Radiation Oncology, Houston, TX, USA
6. Bahcesehir University, Department of Radiation Oncology, Istanbul, Turkey