1. Associate Professor in the Department of Otorhinolaryngology, Jeju National University School of Medicine, Jeju, Republic of Korea
2. Consultant Otorhinolaryngologist in the Department of Otorhinolaryngology, National Health Insurance Corporation Ilsan Hospital, Goyang, Republic of Korea
3. Clinical Assistant Professor in the Department of Otorhinolaryngology, Yonsei University College of Medicine, Seodaemun-gu, Seoul, 120-752, Republic of Korea