1. Cardiovascular Research Institute; National University of Singapore; Singapore
2. Yong Loo Lin School of Medicine; National University of Singapore; Singapore
3. National Heart Centre Singapore; Singapore
4. Changi General Hospital; Singapore
5. Tan Tock Seng Hospital; Singapore
6. Khoo Teck Puat Hospital; Singapore
7. Singapore General Hospital; Singapore
8. National University Heart Centre Singapore; Singapore