1. Cardiff Liver Unit, University Hospital of Wales, Cardiff and Vale NHS Trust, Cardiff, United Kingdom
2. Department of General Surgery, Glan Clwyd Hospital, Rhyl, United Kingdom
3. Department of General Surgery, Royal Glamorgan Hospital, Cwm Taf University Health Board, Pontyclun, United Kingdom
4. Undergraduate Department, School of Medicine, Cardiff University, Cardiff, United Kingdom
5. Hepatobiliary and Pancreatic Surgery and Liver Transplant Unit, Queen Elizabeth Hospital, Birmingham, United Kingdom
6. Department of Hepatobiliary and Pancreatic Surgery, Manchester Royal Infirmary Hospital, Manchester, United Kingdom