[1] Catholic Univ Korea, Div Endocrinol & Metab, Dept Internal Med, Seoul St Marys Hosp,Coll Med, Seoul 137701, South Korea
[2] Catholic Univ Korea, Div Cardiol, Dept Internal Med, Seoul St Marys Hosp,Coll Med, Seoul 137701, South Korea
[3] Catholic Univ Korea, Dept Med Stat, Coll Med, Seoul 137701, South Korea
[4] Soongsil Univ, Dept Stat & Actuarial Sci, Seoul, South Korea