1 Division of Cardiology, Department of Internal Medicine, Cardiovascular Center, Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, Korea. kimic@dsmc.or.kr.
2 Department of Pathology, Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, Korea.
3 Department of Cardiothoracic Surgery, Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, Korea.