1. Departments of Radiation Oncology, Hacettepe University School of Medicine, Ankara, Turkey

2. Department of Radiation Oncology, İstanbul University İstanbul Faculty of Medicine, İstanbul, Turkey

3. Department of Radiology, İstanbul University Cerrahpaşa Faculty of Medicine, İstanbul, Turkey

4. Department of Public Health, İstanbul University İstanbul Faculty of Medicine, İstanbul, Turkey

5. Department of Radiation Oncology, İstanbul University İstanbul Faculty of Medicine, İstanbul, Turkey