1. Department of Cardiovascular Medicine, Chonnam National University Hospital, Chonnam National University Medical School, Gwangju, Korea.
2. Department of Internal Medicine, Cardiovascular Imaging Center, Heart, Vascular & Stroke Institute, Sungkyunkwan University School of Medicine, Seoul, Korea.
3. Department of Neurology and Stroke Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
4. Division of Cardiology, Department of Internal Medicine, Keimyung University Dongsan Medical Center, Daegu, Korea.
5. Division of Cardiology, Department of Internal Medicine, Busan Paik Hospital, Inje University, Busan, Korea.
6. Division of Cardiology, Department of Internal Medicine, Inha University Hospital, Incheon, Korea.
7. Department of Cardiovascular Medicine, Wonkwang University Hospital, Iksan, Korea.
8. Department of Cardiology in Internal Medicine, Jeonbuk National University Medical School and Hospital, Jeonju, Korea.
9. Department of Cardiology, College of Medicine, The Catholic University of Korea, Seoul, Korea.