1. Division of Gastroenterology and Hepatology National University Hospital Singapore
2. Division of Gastroenterology and Hepatology Ng Teng Fong General Hospital Singapore
3. Department of Medicine, Yong Loo Lin School of Medicine National University of Singapore Singapore
4. Division of Infectious Diseases National University Hospital Singapore
5. Infectious Diseases Translational Research Programme, Department of Medicine, Yong Loo Lin School of Medicine National University of Singapore Singapore
6. Department of Laboratory Medicine National University Hospital Singapore