Affiliation: | a Department of Child Health, University of Glasgow, Glasgow, UK b Department of Paediatric Gastroenterology, Royal Hospital for Sick Children, Glasgow, UK c Department of Child Life and Health, University of Edinburgh, Edinburgh, UK d Public Health and Health Policy, University of Glasgow, Glasgow, UK e Gastroenterology Unit, Western General Hospital, University of Edinburgh, Edinburgh, UK f Department of Paediatric Gastroenterology and Nutrition, Royal Hospital for Sick Children, Edinburgh, UK |