1 Department of Cardiology, National University Heart Center, Singapore; Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore. ching_hui_sia@nuhs.edu.sg
2 Department of Medicine, National University Health System, Singapore
3 Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
4 Division of Neurology, Department of Medicine, National University Health System, Singapore
5 Department of Cardiology, National University Heart Center, Singapore