1. Cardiovascular Center, Division of Cardiology Seoul National University Bundang Hospital Gumiro 166, Bundang Seongnam Republic of Korea
2. Department of Internal Medicine Seoul National University Hospital Seoul Republic of Korea
3. Heart Research Center of Chonnam National University Gwangju Republic of Korea
4. Department of Internal Medicine Yonsei University Wonju College of Medicine Wonju Republic of Korea
5. Department of Internal Medicine Yonsei University College of Medicine Seoul Republic of Korea
6. Department of Internal Medicine the Catholic University of Korea Seoul Republic of Korea
7. Department of Internal Medicine Sungkyunkwan University College of Medicine Seoul Republic of Korea
8. Division of Cardiology Asan Medical Center Seoul Republic of Korea
9. Department of Internal Medicine Chungbuk National University College of Medicine Cheongju Republic of Korea
10. Department of Internal Medicine Kyungpook National University College of Medicine Daegu Republic of Korea
11. Mediplex Sejong Hospital Incheon Republic of Korea