1. Department of Physiology, Chungbuk National University, College of Medicine, Cheongju, Korea.
2. Department of Physiology & Biophysics, Seoul National University College of Medicine, Seoul, Korea.
3. Department of Otolaryngology, Seoul Municipal Boramae Hospital, Seoul National University College of Medicine, Seoul, Korea.
4. Department of Physiology, College of Medicine, Kwandong University, Gangneung, Korea.
5. Department of Biochemistry, Chungbuk National University, College of Medicine, Cheongju, Korea.
6. Department of Internal Medicine, Chungbuk National University, College of Medicine, Cheongju, Korea.
7. Department of Surgery, Chungbuk National University, College of Medicine, Cheongju, Korea.
8. Department of Physiology, Medical School, Shanghai Jiaotong University, Shanghai, China.