1. Department of Otorhinolaryngology, Bozyaka Teaching and Research Hospital, Izmir, Turkey;
2. Department of Basic Oncology, Dokuz Eylül University Institute of Oncology, Izmir, Turkey;
3. Department of Otorhinolaryngology, School of Medicine, Dokuz Eylül University, Izmir, Turkey;
4. Department of Radiation Oncology, Faculty of Medicine, Dokuz Eylül University, Izmir, Turkey