1. Dietetics, Nutrition, and Biological Sciences, Queen Margaret University, East Lothian, United Kingdom;
2. Department of Paediatric Gastroenterology and Nutrition, Royal Hospital for Sick Children, Edinburgh, United Kingdom;
3. Department of Paediatric Gastroenterology, Royal Hospital for Sick Children, Yorkhill, Glasgow, United Kingdom;
4. Department of Paediatric Gastroenterology, Bristol Royal Children’s Hospital, Bristol, United Kingdom; and
5. Department of Child Life and Health, University of Edinburgh, Edinburgh, United Kingdom