1. Samsung Medical Center (W.K., J.M.L., K.H.C., D.H., T.K.P., J.H.Y., S.-H.C., H.-C.G., J.-Y.H., Y.B.S.), Sungkyunkwan University School of Medicine, Seoul, Korea.
2. Wonkwang University Hospital, Iksan, Korea (K.H.Y., J.Y.C.).
3. Kangbuk Samsung Hospital (S.-J.L., J.-Y.L.), Sungkyunkwan University School of Medicine, Seoul, Korea.
4. Chungbuk National University Hospital, Chungbuk National University College of Medicine, Cheongju, Korea (S.Y.L., S.M.K.).
5. Chung-Ang University College of Medicine, Chung-Ang University Gwangmyeong Hospital, Gwangmyeong, Korea (S.Y.L.).
6. The Catholic University of Korea, Uijeongbu St. Mary’s Hospital, Seoul (C.J.K., H.-S.A.).
7. Keimyung University Dongsan Hospital, Daegu, Korea (C.-W.N., H.-J.Y.).
8. Samsung Changwon Hospital (Y.H.P.), Sungkyunkwan University School of Medicine, Seoul, Korea.
9. Chung-Ang University College of Medicine, Chung-Ang University Hospital, Seoul, Korea (W.S.L.).
10. Chungnam National University Hospital, Chungnam National University College of Medicine, Daejeon, Korea (J.-O.K., P.S.S.).
11. Inje University Ilsan-Paik hospital, Goyang, Korea (J.-H.D.).
12. Cardiovascular Center, Hallym University Sacred Heart Hospital, Anyang, Korea (S.-H.J.).
13. Seoul National University Bundang Hospital, Seongnam, Korea (C.-H.Y.).
14. Gyeongsang National University School of Medicine, Gyeongsang National University Hospital, Jinju, Korea (M.G.K., J.-S.K.).
15. The Catholic University of Korea, Incheon St Mary’s Hospital, Seoul (K.Y.L.).
16. Hanyang University Seoul Hospital, College of Medicine, Hanyang University, Seoul, Korea (Y.-H.L.).
17. Hanyang University Myongji Hospital, Goyang, Korea (Y.-H.C.).
18. Kyung Hee University Hospital at Gangdong, Seoul, Korea (J.-M.C.).
19. Ewha Womans University College of Medicine, Seoul, Korea (W.J.J.).
20. Pusan National University Yangsan Hospital, Yangsan, Korea (K.-J.C.).