1. Research Center for Natural Human Defense System, Yonsei University College of Medicine, Seoul, South Korea.
2. The Airway Mucus Institute, Yonsei University College of Medicine, Seoul, South Korea.
3. Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, South Korea.
4. Department of Otolaryngology–Head and Neck Surgery, Chung-Ang University College of Medicine, Seoul, South Korea.
5. Department of Pharmacy, College of Pharmacy, Korea University, Seoul, South Korea.
6. Department of Life Science, Ewha Womans University, Seoul, South Korea.
7. BK 21 Project for Medical Science, Yonsei University College of Medicine, Seoul, South Korea.