[1] Chungnam Natl Univ, Div Endocrinol & Metab, Dept Internal Med, Sch Med, Daejeon, South Korea
[2] Gwangmyeong Sungae Hosp, Dept Internal Med, 36 Digital Ro, Gwangmyeong 14241, South Korea
[3] Catholic Univ Korea, Div Endocrinol & Metab, Dept Internal Med, Coll Med, Seoul, South Korea
[4] Kyung Hee Univ, Sch Med, Dept Endocrinol & Metab, Seoul, South Korea
[5] Sungkyunkwan Univ, Samsung Med Ctr,Sch Med, Div Endocrinol & Metab, Dept Internal Med, Seoul, South Korea
[6] Korea Univ, Div Endocrinol & Metab, Dept Internal Med, Coll Med, Seoul, South Korea
[7] Seoul Natl Univ, Dept Internal Med, Seoul Metropolitan Govt Boramae Med Ctr, Coll Med, Seoul, South Korea
[8] Yonsei Univ, Div Endocrinol & Metab, Dept Internal Med, Coll Med, Seoul, South Korea
[9] Chosun Univ, Div Endocrinol & Metab, Dept Internal Med, Coll Med, Gwangju, South Korea