1. Department of Paediatric Gastroenterology, Great Ormond Street Hospital for Children, London, UK
2. The Juliet Keidan Institute of Paediatric Gastroenterology and Nutrition, Shaare Zedek Medical Center, The Hebrew University, Jerusalem, Israel
3. Department of Paediatric Gastroenterology and Nutrition, Emma Children’s Hospital, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
4. Department of Paediatrics, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
5. Department of Paediatric Gastroenterology, Hepatology and Nutrition, Hospital Sant Joan de Déu, Barcelona, Spain
6. Department of Paediatrics, Woman’s & Child’s University Hospital of Verona, Verona, Italy
7. Department of Gastroenterology, Hepatology and Nutrition, University Medical Centre Maribor, Maribor, Slovenia
8. Department of Gastroenterology, Hepatology and Nutrition, Faculty of Medicine, University Medical Centre Ljubljana, Ljubljana, Slovenia
9. Service de Gastroentérologie, Hépatologie, Nutrition, Diabétologie et Maladies Héréditaires du Métabolisme, Hôpital des Enfants, CHU de Toulouse, F-31300 Toulouse, France, and IRSD, Université de Toulouse, INSERM, INRAE, ENVT, UPS, Toulouse, France
10. Department of Translational Medicine Science, Section of Paediatrics, University of Naples “Federico II”, Naples, Italy
11. Paediatric Gastroenterology Department, Al Jalila Children’s Specialty Hospital, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai, United Arab Emirates
12. Centre for Paediatric Gastroenterology, Sheffield Children’s Hospital, Weston Bank, Sheffield, UK.