1. Department of Endocrinology and Metabolism, Kyung Hee University Hospital at Kangdong, Seoul 134-727, Korea.
2. Department of Pharmacology, Kyung Hee University College of Medicine, Seoul 134-727, Korea.
3. Department of Ophthalmology, Kyung Hee University Hospital at Kangdong, Seoul 134-727, Korea.
4. Carcinogenesis Branch, Division of Cancer Biology, National Cancer Center, Goyang, Korea.
5. Department of Endocrinology and Metabolism, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
6. Department of Physiology, College of Medicine, The Catholic University of Korea, Seoul, Korea.
7. Department of Internal Medicine, Hangang Sacred Heart Hospital, Hallym University School of Medicine, Seoul, Korea.