1. Department of Surgery University Surgical Cluster, National University Hospital, National University Health System Singapore
2. Department of General Surgery Sengkang General Hospital Singapore
3. Yong Loo Lin School of Medicine National University of Singapore Singapore
4. Department of General Surgery, Ng Teng Fong General Hospital National University Health System Singapore
5. Division of Hepatobiliary and Pancreatic Surgery University Surgical Cluster, National University Hospital, National University Health System Singapore