1. Division of Gastroenterology and Hepatology; Department of Medicine; National University Health System; Singapore
2. Yong Loo Lin School of Medicine; National University of Singapore; Singapore
3. Singapore Clinical Research Institute; Singapore
4. Abbott Laboratories; Abbott Park IL USA
5. Tan Tock Seng Hospital; Singapore
6. Singapore General Hospital; Singapore
7. Changi General Hospital; Singapore
8. Khoo Teck Puat Hospital; Singapore