1. Department of Physiology, College of Medicine, Chung-Ang University, Seoul 06974, Korea.
2. Biomedical Research Institute, College of Medicine, Chung-Ang University, Seoul 06974, Korea.
3. Department of Internal Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea.
4. Department of Biochemistry, School of Medicine, Konkuk University, Seoul 05029, Korea.