1. Department of Physiology, Seoul National University College of Medicine, Seoul 03080, Korea.
2. Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul 03080, Korea.
3. Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul 03080, Korea.
4. Department of Otolaryngology, Seoul National University Hospital, Seoul 03080, Korea.
5. Cancer Research Institute, Seoul National University College of Medicine, Seoul 03080, Korea.
6. Chung-Ang University Red Cross College of Nursing, Seoul 06974, Korea