[1] Keimyung Univ, Dept Internal Med, Sch Med, Daegu 42601, South Korea
[2] Soongsil Univ, Dept Stat & Actuarial Sci, Seoul 06978, South Korea
[3] Yonsei Univ, Inst Endocrine Res, Coll Med, Seoul 03722, South Korea
[4] Yonsei Univ, Dept Internal Med, Div Endocrinol, Coll Med, 50-1 Yonsei Ro, Seoul 03722, South Korea
[5] Catholic Univ, Coll Med, Dept Internal Med, Div Endocrinol & Metab, Seoul 16247, South Korea
[6] Yonsei Univ, Glycosylat Network Res Ctr, Dept Syst Biol, Seoul 03772, South Korea