Academic Unit of Gastroenterology, Royal Hallamshire Hospital, Sheffield Teaching Hospital NHS Foundation Trust, Sheffield, UK. anupam.rej@nhs.net. Division of Nutritional Sciences, School of Biosciences, University of Nottingham, Nottingham, UK. Academic Unit of Gastroenterology, Royal Hallamshire Hospital, Sheffield Teaching Hospital NHS Foundation Trust, Sheffield, UK. Leeds Gastroenterology Institute, St James's University Hospital, Leeds, UK; Leeds Institute of Medical Research at St James's, University of Leeds, Leeds, UK. Department of Nutrition and Dietetics, Royal United Hospitals NHS Foundation Trust, Bath, UK. Specialist Gastroenterology Community Dietetic Service, Somerset Partnership NHS Foundation Trust, Bridgwater, UK. Information Manager/Specialist Gastroenterology Dietitian, Guts UK Charity, 3 St Andrews Place, London, NW1 4LB, UK.