[1] Brighton & Sussex Med Sch, Dept Clin & Expt Med, Brighton, E Sussex, England
[2] Univ Hosp Sussex NHS Fdn Trust, Dept Gastroenterol & Hepatol, Brighton, E Sussex, England
[3] Brighton & Sussex Med Sch, Dept Primary Care & Publ Hlth, Brighton, E Sussex, England
[4] Univ Nottingham, NIHR Nottingham Biomed Res Ctr, Nottingham, England
[5] Nottingham Univ Hosp NHS Trust, Nottingham, England
[6] Univ Nottingham, Sch Med, Nottingham Digest Dis Ctr, Nottingham, England
[7] Arch Hlthcare Brighton, Brighton, E Sussex, England
[8] Royal Free Hosp, Dept Hepatol, London, England