1. Department of Radiation Oncology, Baskent University Faculty of Medicine, Adana Dr. Turgut Noyan Research and Treatment Center, Adana, Turkey.
2. Department of Radiation Oncology, Hacettepe University Faculty of Medicine, Ankara, Turkey.
3. Department of Radiation Oncology, Selcuk University Faculty of Medicine, Konya, Turkey.
4. Department of Radiation Oncology, Ankara University Faculty of Medicine, Ankara, Turkey.