1. Division of Cardiology, Department of Medicine, Sungkyunkwan University School of Medicine, Seoul, Korea.
2. Division of Cardiology, Department of Medicine, Keimyung University Dongsan Medical Center, Daegu, Korea.
3. Division of Cardiology, Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea.
4. Division of Cardiology, Department of Medicine, University of Ulsan College of Medicine, Seoul, Korea.
5. Division of Cardiology, Department of Medicine, Kyungpook National University College of Medicine, Daegu, Korea.
6. Division of Cardiology, Department of Medicine, The Catholic University of Korea, Seoul, Korea.
7. Division of Cardiology, Department of Medicine, Yonsei University College of Medicine, Seoul, Korea.
8. Division of Cardiology, Department of Medicine, Seoul National University Bundang Hospital, Seongnam, Korea.
9. Division of Cardiology, Department of Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea.
10. Division of Cardiology, Department of Medicine, Heart Research Center of Chonnam National University, Gwangju, Korea.
11. Division of Cardiology, Department of Medicine, Chungbuk National University College of Medicine, Cheongju, Korea.
12. Division of Cardiovascular and Rare Diseases, Department of Biomedical Science, National Institute of Health (NIH), Osong, Korea.