[1] Kings Coll Hosp London, ENETS Neuroendocrine Ctr Excellence, Inst Liver Studies, London SE5 9RS, England
[2] Kings Coll London, Dept Res Oncol, Div Canc Studies, London WC2R 2LS, England
[3] Kings Coll Hosp London, Histopathol Dept, Inst Liver Studies, London SE5 9RS, England
[4] Univ Hosp Lewisham, Gastroenterol Dept, London SE13 6LH, England
[5] Hampshire Hosp NHS Trust, Gastroenterol Dept, Basingstoke RG24 9NA, Hants, England