1. Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.
2. BK21 Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea.
3. Institute of Endocrine Research, Yonsei University College of Medicine, Seoul, Korea.
4. Department of Pharmacology, Yonsei University College of Medicine, Seoul, Korea.
5. National Institute of Health, Seoul, Korea.
6. Department of Endocrinology, Soonchunhyang University College of Medicine, Seoul, Korea.