1. Department of Otorhinolaryngology—Head and Neck Surgery, Uijeongbu St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Uijeongbu, Korea
2. Department of Clinical Laboratory, Uijeongbu St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Uijeongbu, Korea
3. Department of Otorhinolaryngology—Head and Neck Surgery, St. Paul Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea