[1] Inha Univ, Sch Med, Div Endocrinol & Metab, Dept Internal Med, Incheon, South Korea
[2] Univ Ulsan, Asan Inst Life Sci, Asan Med Ctr, Coll Med, Ulsan, South Korea
[3] Univ Ulsan, Asan Med Ctr, Coll Med, Dept Internal Med,Div Endocrinol & Metab, Ulsan, South Korea