1. Department of Otorhinolaryngology-Head and Neck surgery, Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea.
2. Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea.
3. Department of Microbiology, Yonsei University College of Medicine, Seoul, Korea.
4. Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea.
5. Department of Life Science, Research Institute for Natural Sciences, Hanyang University College of Natural Sciences, Seoul, Korea.
6. The Airway Mucus Institute, Yonsei University College of Medicine, Seoul, Korea.
7. Global Research Laboratory for Allergic Airway Diseases, Seoul, Korea.
8. Department of Microbiology, Institute for Immunology and Immunological Diseases, Yonsei University College of Medicine, Seoul, Korea.