1. Division of Endocrinology and Metabolism, Department of Internal Medicine; Korea University College of Medicine; 73 Inchon-ro Seongbuk-gu Seoul 136-705 Korea
2. Division of Endocrinology and Metabolism, Department of Internal Medicine; Konkuk University School of Medicine; 120-1 Neungdong-ro Gwangjin-gu Seoul 143-739 Korea
3. Berry & Bio Food Research Institute; 558, Bokbunja-ro, Buan-myeon Gochang-gun Jeollabuk-do 585-943 Korea