Foong Way David Tai1, Hey-Long Ching1, Melissa F Hale1, Mark E McAlindon2. 1. Academic Department of Gastroenterology and Hepatology, Royal Hallamshire Hospital, Sheffield Teaching Hospitals NHS Trust, Sheffield S10 2JF, UK. 2. Academic Department of Gastroenterology and Hepatology, Royal Hallamshire Hospital, Sheffield Teaching Hospitals NHS Trust, Sheffield S10 2JF, UK. Electronic address: mark.mcalindon@sth.nhs.uk.