1. Department of Otorhinolaryngology & Head and Neck Surgery, Bakırköy Dr. Sadi Konuk Training and Research Hospital, Zuhuratbaba, Dr. Tevfik Sağlam Street, 11, Istanbul 34147, Turkey
2. Department of Otorhinolaryngology & Head and Neck Surgery, Sultangazi Haseki Training and Research Hospital, Istanbul 34260, Turkey