1. Division of Cardiology, Department of Internal Medicine, Cardiovascular Center Korea University Anam Hospital, Korea University College of Medicine Seoul Republic of Korea
2. Division of Cardiology, Department of Internal Medicine, Regional Cardiocerebrovascular Center Wonkwang University Hospital Iksan Republic of Korea
3. Division of Cardiology, Department of Internal Medicine College of Medicine, Hanyang University Seoul Republic of Korea
4. Cardiovascular Center Donggunsan Hospital Gunsan Republic of Korea
5. Division of Cardiology, Department of Internal Medicine Severance Cardiovascular Hospital, Yonsei University College of Medicine Seoul Republic of Korea
6. Division of Cardiology, Department of Internal Medicine Gangnam Severance Hospital, Yonsei University College of Medicine Seoul Republic of Korea
7. Division of Cardiology, Department of Internal Medicine Chungnam National University Hospital Daejeon Republic of Korea
8. Division of Cardiology Department of Internal Medicine Seoul National University Bundang Hospital Seongnam Republic of Korea
9. Division of Cardiology, Department of Internal Medicine, Asan Medical Center University of Ulsan College of Medicine Seoul Republic of Korea
10. Division of Cardiology, Department of Internal Medicine Chonbuk National University Hospital Jeonju Republic of Korea
11. Division of Cardiology, Department of Medicine, Samsung Medical Center Sungkyunkwan University School of Medicine Seoul Republic of Korea
12. Division of Cardiology Department of Internal Medicine Hallym University Sacred Heart Hospital Seoul Republic of Korea