1. Division of Cardiology, Department of Internal Medicine, Keimyung University Dongsan Medical Center, Daegu, Korea.
2. Division of Cardiology, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
3. Division of Cardiology, Department of Internal Medicine, Kosin University College of Medicine, Busan, Korea.
4. Division of Cardiology, Department of Internal Medicine, Busan Paik Hospital, Inje University, Busan, Korea.
5. Division of Cardiology, Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea.
6. Department of Cardiology, Center for Clinical Specialty, National Cancer Center, Goyang, Korea.
7. Division of Cardiology, Department of Internal Medicine, Chungbuk National University Hospital, Chungbuk National University College of Medicine, Cheongju, Korea.
8. Division of Cardiology, Department of Medicine, Cardiovascular and Stroke Imaging Center, Heart Vascular and Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.