1. Department of Endocrinology & Metabolism, School of Medicine, Kyung Hee University, 1, Hoegi-dong, Dongdaemun-gu, Seoul 130-701, Republic of Korea
2. Research Institute of Endocrinology, Kyung Hee University Hospital, 1, Hoegi-dong,
Dongdaemun-gu, Seoul 130-702, Republic of Korea
3. Department of Medicine, Graduate School, Kyung Hee University, Hoegi-dong, Dongdaemun-gu, Seoul 130-702, Republic of Korea