Authors: Simon P Bach; Alexandra Gilbert; Kristian Brock; Stephan Korsgen; Ian Geh; James Hill; Talvinder Gill; Paul Hainsworth; Matthew G Tutton; Jim Khan; Jonathan Robinson; Mark Steward; Christopher Cunningham; Bruce Levy; Alan Beveridge; Kelly Handley; Manjinder Kaur; Natalie Marchevsky; Laura Magill; Ann Russell; Philip Quirke; Nicholas P West; David Sebag-Montefiore Journal: Lancet Gastroenterol Hepatol Date: 2020-12-10