[1] Chonnam Natl Univ Hosp, Dept Internal Med, Gwangju, South Korea
[2] Cardiovasc Ctr, Gwangju, South Korea
[3] Samsung Med Ctr, Heart Vasc Stroke Inst, Dept Internal Med, Div Cardiol, Seoul, South Korea
[4] Sungkyunkwan Univ, Samsung Med Ctr, Cardiovasc Imaging Ctr, Dept Radiol,Sch Med, Seoul, South Korea
[5] Sungkyunkwan Univ, Samsung Med Ctr, Dept Thorac & Cardiovasc Surg, Sch Med, Seoul, South Korea