1. Division of Cardiology, Department of Internal Medicine, Heart Vascular Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea (K.H.C., Y.B.S., J.M.L., T.K.P., J.H.Y., J.-Y.H., J.-H.C., S.-H.C., H.-C.G.).
2. Department of Internal Medicine and Cardiovascular Center, Seoul National University Hospital, Republic of Korea (H.-S.K., B.-K.K.).
3. Division of Cardiology, Department of Internal Medicine, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Republic of Korea (W.J.C.).
4. Division of Cardiology, Department of Internal Medicine, Keimyung University Dongsan Medical Center, Daegu, Republic of Korea (S.-H.H.).
5. Division of Cardiology, Department of Internal Medicine, Gachon University Gil Hospital, Incheon, Republic of Korea (S.H.H.).
6. Division of Cardiology, Department of Internal Medicine, Korea University Guro Hospital, Seoul, Republic of Korea (S.-W.R.).
7. Division of Cardiology, Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Gyeonggi-do, Republic of Korea (I.-H.C.).
8. Division of Cardiology, Department of Medicine, Chungnam National University Hospital, Daejeon, Republic of Korea (J.-O.J.).
9. Division of Cardiology, Department of Internal Medicine, Kosin University Gospel Hospital, Kosin University College of Medicine, Busan, Republic of Korea (J.H.H.).
10. Division of Cardiology, Department of Internal Medicine, Wonju Severance Christian Hospital, Yonsei University Wonju College of Medicine, Republic of Korea (J.Y.).
11. Division of Cardiology, Department of Internal Medicine, Korea University Anam Hospital, Seoul, Republic of Korea (D.-S.L., S.-J.H.).
12. Division of Cardiology, Department of Internal Medicine, Yeungnam University Medical Center, Daegu, Republic of Korea (J.-S.P.).
13. Division of Cardiology, Department of Internal Medicine, Severance Cardiovascular Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea (M.-K.H.).
14. Division of Cardiology, Department of Internal Medicine, Inje University Ilsan Paik Hospital, Goyang, Republic of Korea (J.-H.D.).
15. Division of Cardiology, Department of Internal Medicine, Pusan National University Hospital, Busan, Republic of Korea (K.S.C.).
16. Division of Cardiology, Department of Internal Medicine, Inje University Haeundae Paik Hospital, Goyang, Republic of Korea (D.-I.K.).
17. Division of Cardiology, Department of Internal Medicine, Chungbuk National University College of Medicine, Cheongju, Republic of Korea (S.Y.L.).
18. Division of Cardiology, Department of Internal Medicine, Seoul St. Mary’s Hospital, The Catholic University of Korea, Republic of Korea (K.C.).
19. Division of Cardiology, Department of Internal Medicine, St. Paul’s Hospital, The Catholic University of Korea, Seoul, Republic of Korea (B.-H.H.).
20. Division of Cardiology, Department of Internal Medicine, Ajou University Hospital, Suwon, Republic of Korea (S.-Y.C.).
21. Division of Cardiology, Department of Internal Medicine, Chonnam National University Hospital, Gwangju, Korea (M.H.J.).