Department of Otolaryngology, Izzet Baysal Medicine Faculty of Abant Izzet Baysal University, Bolu, Turkey
2.Bezmialem Vakif University, Faculty of Medicine, Department of Otorhinolaryngology Head and Neck Surgery Istanbul
3.Haseki Research and Training Hospital, Department of Otorhinolaryngology and Head and Neck Surgery, Istanbul, Turkey
4.Depertman of Biostatistic and Medical Informatics, Faculty of Medicine, University of Fırat, Elazığ, Turkey