Department of Endocrinology & Metabolism, Kyung Hee University Hospital, Seoul, Republic of Korea. Research Institute of Medical Nutrition, Kyung Hee University, Seoul, Republic of Korea. Il San Gospel Hospital, Goyang-si, Gyeonggi-do, Republic of Korea. Department of Endocrinology and Metabolism, Kyung Hee University School of Medicine, 23 Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Republic of Korea. rheesy@khu.ac.kr. Department of Endocrinology and Metabolism, Kyung Hee University School of Medicine, 23 Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Republic of Korea. Department of Medical Nutrition, Graduate School of East-West Medical Science, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin, 17104, Republic of Korea. hjlim@khu.ac.kr.