1 Division of Cardiology, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea; Catholic Research Institute for Intractable Cardiovascular Disease College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
2 Division of Cardiology, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea; Catholic Research Institute for Intractable Cardiovascular Disease College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea. Electronic address: floria0515@gmail.com.