1. Department of Otorhinolaryngology-Head and Neck Surgery, Soonchunhyang University College of Medicine, Cheonan 31151, Korea.
2. Obstructive Upper airway Research (OUaR) Laboratory, Department of Pharmacology, Seoul National University College of Medicine, Seoul 03080, Korea.
3. Department of Biomedical Sciences, Seoul National University Graduate School, Seoul 03080, Korea.
4. Cancer Research Institute, Seoul National University College of Medicine, Seoul 03080, Korea.
5. Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul 03080, Korea.
6. Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Hospital, Seoul 03080, Korea.