[1] Chungbuk Natl Univ, Chungbuk Natl Univ Hosp, Dept Internal Med, Coll Med, Cheongju, South Korea
[2] Yonsei Univ, Coll Med, Dept Internal Med, Severance Hosp,Endocrine Res Inst, 50-1 Yonsei Ro, Seoul 03722, South Korea
[3] Korea Univ, Dept Internal Med, Coll Med, Seoul, South Korea
[4] Seoul Natl Univ, Div Endocrinol & Metab, Dept Med, Seoul Natl Univ Hosp,Coll Med, Seoul, South Korea
[5] Kennyung Univ, Dept Internal Med, Sch Med, Daegu, South Korea
[6] Seoul Natl Univ, Dept Internal Med, Bundang Hosp, Seongnam, South Korea
[7] Jeonbuk Natl Univ, Div Endocrinol & Metab, Dept Internal Med, Med Sch, Jeonju, South Korea
[8] Univ Ulsan, Asan Med Ctr, Coll Med, Div Endocrinol & Metab,Dept Med, Ulsan, South Korea
[9] Sungkyunkwan Univ, Dept Med, Div Endocrinol & Metab, Samsung Med Ctr,Sch Med, Seoul, South Korea
[10] Natl Hlth Insurance Serv, Div Endocrinol & Metab, Ilsan Hosp, Dept Internal Med, Goyang, South Korea
[11] Hallym Univ, Dongtan Sacred Heart Hosp, Dept Internal Med, Coll Med, Hwaseong, South Korea
[12] Chonnam Natl Univ, Dept Internal Med, Med Sch, Gwangju, South Korea
[13] Yonsei Univ, Thyroid Endocrine Surg Div, Dept Surg, Coll Med, Seoul, South Korea
[14] Sungkyunkwan Univ, Samsung Med Ctr, Dept Radiol, Sch Med, Seoul, South Korea
[15] Seoul Natl Univ, Coll Med, Dept Lab Med, Seoul Natl Univ Hosp, Seoul, South Korea
[16] Catholic Univ Korea, Coll Med, Dept Lab Med, Seoul, South Korea
[17] Seoul Natl Univ, Dept Pathol, Coll Med, Seoul, South Korea
[18] Catholic Univ Korea, Dept Hosp Pathol, Coll Med, Seoul, South Korea
[19] Sungkyunkwan Univ, Sch Med, Dept Nucl Med, Samsung Med Ctr, Seoul, South Korea
[20] Seoul Natl Univ, Dept Nucl Med, Coll Med, Seoul Natl Univ Hosp, Seoul, South Korea
[21] Hallym Univ, Coll Med, Dept Internal Med, Chuncheon Sacred Heart Hosp, Chunchon, South Korea
[22] Sejong Gen Hosp, Dept Internal Med, Div Endocrinol & Metab, 28 Hohyeon Ro 489Beon-gil, Bucheon 14754, South Korea