Cem Onal1,2, Ezgi Oymak3. 1. Department of Radiation Oncology, Adana Dr. Turgut Noyan Research and Treatment Center, Baskent University Faculty of Medicine, 01120, Adana, Turkey. hcemonal@hotmail.com. 2. Department of Radiation Oncology, Baskent University Faculty of Medicine, Ankara, Turkey. hcemonal@hotmail.com. 3. Division of Radiation Oncology, Iskenderun Gelisim Hospital, Hatay, Turkey.