[1] Oxford Univ Hosp NHS Fdn Trust, John Radcliffe Hosp, Dept Gastroenterol & Hepatol, Oxford, England
[2] UCL, UCL Inst Liver & Digest Hlth, London, England
[3] Univ Hosp Bristol & Weston NHS Fdn Trust, Bristol Royal Infirm, Dept HPB Surg, Bristol, England
[4] North Bristol NHS Trust Southmead Hosp, Dept Transplant Surg, Bristol, England
[5] Univ Hosp & Bristol & Weston NHS Fdn Trust, Bristol Royal Infirm, Dept HPB Surg, Upper Maudlin St, Bristol BS2 8HW, England
[6] Southmead Hosp, Dept Transplant Surg, North Bristol NHS Trust, Bristol BS10 5NB, England