1. Department of Cardiology Chonnam National University Hospital Gwangju South Korea
2. Department of Internal Medicine Chonnam National University Medical School Gwangju South Korea
3. Cardiovascular Center Department of Internal Medicine Seoul National University Bundang Hospital Seongnam South Korea
4. Department of Cardiology Chosun University Hospital Gwangju South Korea
5. Department of Cardiology Korea University Guro Hospital Seoul South Korea
6. Department of Cardiology Inha University Hospital Incheon South Korea
7. Department of Cardiology Chungnam National University Hospital Daejeon South Korea
8. Department of Cardiology Yeungnam University Medical Center Daegu South Korea
9. Department of Cardiology Inje University Sanggye Paik Hospital Seoul South Korea
10. Department of Internal Medicine Konkuk University School of Medicine Chungju South Korea