1. Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
2. Cardiovascular Research Institute, National University Heart Centre Singapore, Singapore, Singapore.
3. Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
4. CellResearch Corporation Pte, Ltd., Singapore, Singapore.
5. Department of Cardiac, Thoracic and Vascular Surgery, National University Hospital, Singapore, Singapore.