Correspondence to: Kiyuk Chang, MD, PhD, Division of Cardiology, Department of Internal Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul 06591, Republic of Korea. Email

E-mail Address: [email protected]

https://orcid.org/0000-0003-3456-8705

Division of Cardiology, Seoul St. Mary’s Hospital, The Catholic University of Korea (E.H.C., B.-H.H, K.Y.L., Y.S.C., K.C.).