1. Division of Endocrinology and Metabolism (E.Y.L, D.K., K.M.K., Y.R., S.K.L.)
2. Department of Internal Medicine, Yonsei University College of Medicine, Executive Healthcare Clinic (K.J.K.), Severance Hospital, Seoul 120-752, Korea
3. Division of Endocrinology and Metabolism (H.S.C.), Department of Internal Medicine, Dongguk University College of Medicine, Ilsan 410-773, Korea