[1] Seoul Natl Univ Hosp, Dept Internal Med, Div Cardiol, 101 Daehak Ro, Seoul 03080, South Korea
[2] Inje Univ, Dept Internal Med, Div Endocrinol & Metab, Ilsan Paik Hosp, Goyang, South Korea
[3] Korea Univ, Coll Med, Dept Internal Med, Div Cardiol,Anam Hosp, Seoul, South Korea
[4] Korea Univ, Dept Internal Med, Div Endocrinol & Metab, Coll Med, Seoul, South Korea
[5] Yonsei Univ, Severance Cardiovasc Hosp, Cardiovasc Res Inst, Dept Internal Med,Div Cardiol,Coll Med, Seoul, South Korea
[6] Yeungnam Univ, Dept Internal Med, Div Endocrinol, Med Ctr, Daegu, South Korea
[7] Seoul Natl Univ, Seoul Metropolitan Govt, Dept Internal Med, Div Endocrinol & Metab,Boramae Med Ctr,Coll Med, 20 Boramae Ro 5 Gil, Seoul 07061, South Korea