1. From the Division of Cardiology, Department of Internal Medicine, Severance Cardiovascular Hospital, Yonsei University Health System, Seoul, Korea (J.-S.K., J.H.K., D.-H.S., B.-K.K., Y.-G.K., D.C., Y.J., M.-K.H.); and Cardiovascular Research Institute (J.-S.K., D.-H.S., B.-K.K., Y.-G.K., D.C., Y.J., M.-K.H.) and Severance Biomedical Science Institute (Y.J., M.-K.H.), Yonsei University College of Medicine, Seoul, Korea.