1. Division of Cardiology, Department of Internal Medicine, Seoul St. Mary’s Hospital, The Catholic University of Korea, Seoul, Korea.
2. Division of Cardiology, Department of Internal Medicine, Eunpyeong St. Mary’s Hospital, The Catholic University of Korea, Seoul, Korea.
3. Department of Biomedicine & Health Sciences, The Catholic University of Korea, Seoul, Korea.
4. Department of Biomedical Sciences, City University of Hong Kong, Kowloon, Hong Kong.