1. BMedSci, MBChB Department of Hepatobiliary, Pancreatic and Transplant Surgery, Freeman Hospital, Newcastle University NHS Trust Hospitals, NE7 7DN, Newcastle upon Tyne, UK Institute of Cellular Medicine, Newcastle University, NE2 4HH, Newcastle upon Tyne, UK
2. College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
3. Department of Surgery, Southampton University Hospital NHS Foundation Trust, Southampton, UK
4. Department of Hepatobiliary, Pancreatic and Transplant Surgery, Freeman Hospital, Newcastle University NHS Trust Hospitals, Newcastle upon Tyne, UK; Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK