1 Division of Cardiology, Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea.
2 School of Convergence and Innovation in Technology and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Korea. [email protected].
3 Liverpool Centre for Cardiovascular Science at University of Liverpool, Liverpool John Moores University and Liverpool Heart & Chest Hospital, Liverpool, United Kingdom.
4 Danish Center for Health Services Research, Department of Clinical Medicine, Aalborg University, Aalborg, Denmark.