1. Department of Radiation Oncology, Cumhuriyet University Faculty of Medicine, Sivas, Turkey

2. Department of Radiation Oncology, University of Health Sciences Turkey, Balıkesir Atatürk City Hospital, Balıkesir, Turkey

3. Department of Radiation Oncology, University of Health Sciences Turkey, Dr. Abdurrahman Yurtaslan Ankara Oncology Training and Research Hospital, Ankara, Turkey

4. Department of Radiation Oncology, University of Health Sciences Turkey, Kütahya Evliya Çelebi Training and Research Hospital, Kütahya, Turkey

5. Department of Otorhinolaryngology, Cumhuriyet University Faculty of Medicine, Sivas, Turkey