[1] Cedars Sinai Med Ctr, Smidt Heart Inst, Dept Cardiol, 127 S San Vicente Blvd,Third Floor Cardiol A3107, Los Angeles, CA 90048 USA
[2] Catholic Univ Korea, Coll Med, Catholic Res Inst Intractable Cardiovasc Dis, Dept Internal Med,Seoul St Marys Hosp,Div Cardiol, 222 Banpo Daero, Seoul 06591, South Korea
[3] Sungkyunkwan Univ, Samsung Med Ctr, Heart Vasc Stroke Inst, Div Cardiol,Dept Med,Sch Med, Seoul, South Korea
[4] Keimyung Univ, Dept Internal Med, Div Cardiol, Dongsan Hosp, Daegu, South Korea
[5] Yonsei Univ, Biostat Collaborat Unit, Coll Med, Seoul, South Korea
[6] Cedars Sinai Med Ctr, Smidt Heart Inst, Dept Cardiothorac Surg, Los Angeles, CA 90048 USA