[1] Aberdeen Royal Infirm, Dept Gastroenterol, Aberdeen AB25 2ZN, Scotland
[2] Kings Coll London, Inst Liver Studies, London WC2R 2LS, England
[3] Derby Hosp NHS Fdn Trust, Royal Derby Hosp, Derby, England
[4] Univ London Imperial Coll Sci Technol & Med, London, England
[5] Barts & London Queen Marys Sch Med & Dent, Ctr Digest Dis, London, England
[6] Gartnavel Royal Hosp, Brownlee Ctr, Glasgow, Lanark, Scotland
[7] Royal Infirm Edinburgh NHS Trust, Ctr Liver & Digest Dis, Edinburgh, Midlothian, Scotland
[8] Western Gen Hosp, Reg Infect Dis Unit, Edinburgh EH4 2XU, Midlothian, Scotland
[9] Queen Elizabeth Hosp, Liver Unit, Birmingham B15 2TH, W Midlands, England
[10] Nottingham Univ Hosp NHS Trust, Queens Med Ctr, Nottingham, England
[11] Univ Dundee, Ninewells Hosp, Biomed Res Inst, Dundee, Scotland