1. From the Division of Cardiology, Department of Internal Medicine, Severance Cardiovascular Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea (D.K., E.J., H.T.Y., T.-H.K., J.-S.U., J.-Y.K., H.-N.P., M.-H.L., B.J.)
2. Department of Cardiology, CHA Bundang Medical Center, CHA University, Seongnam, Republic of Korea (P.-S.Y., J.-H.S.)
3. Cardiovascular Medicine, Liverpool Centre for Cardiovascular Science, University of Liverpool and Liverpool Heart & Chest Hospital, United Kingdom (G.Y.H.L.).