1 Department of Hepato-Pancreato-Biliary and Liver Transplant surgery, Queen Elizabeth University Hospitals Birmingham NHS Foundation Trust, Birmingham B15 2TH, UK. Electronic address: pgavrielidis@yahoo.com.
2 Department of Hepato-Pancreatico-Biliary Surgery and Transplantation, Hospital Universitari Vall d'Hebron, Barcelona 08035, Spain.
3 Department of Hepato-Pancreato-Biliary and Liver Transplant surgery, Queen Elizabeth University Hospitals Birmingham NHS Foundation Trust, Birmingham B15 2TH, UK.