1. Department of Otorhinolaryngology, Chungbuk National University Hospital, Cheongju, Republic of Korea
2. Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea
3. Department of Otorhinolaryngology, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
4. Department of Pathology, Seoul National University Hospital, Seoul, Republic of Korea
5. Department of Pediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea
6. Department of Pediatrics, Seoul National University Children’s Hospital, Seoul, Republic of Korea
7. Department of Pediatrics, Hallym University Sacred Heart Hospital, Anyang, Republic of Korea
8. Department of Pediatrics, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
9. Sensory Organ Research Institute, Seoul National University Medical Research Center, Republic of Korea