1. Yong Loo Lin School of Medicine, National University of Singapore, Singapore
2. Division of Gastroenterology and Hepatology, Department of Medicine, National University Hospital, Singapore
3. National University Centre for Organ Transplantation, National University Health System, Singapore
4. Nottingham University Hospitals NHS Trust, Nottingham, England, UK
5. Department of Cardiology, National University Heart Centre, National University Hospital, Singapore
6. Department of General Surgery, Singapore General Hospital, Singapore
7. Division of Gastroenterology, Department of Internal Medicine, Hepatology and Nutrition, Virginia Commonwealth University, Richmond, Virginia, USA
8. Houston Research Institute, Houston, Texas, USA