1. Pediatric Gastroenterology Hospital Lusíadas Porto Portugal
2. Maternal and Child Health Department, University Hospital ‐ Umberto I Sapienza ‐ University of Rome Rome Italy
3. Division of Gastroenterology and Hepatology, First Department of Pediatrics, Children's hospital Agia Sofia University of Athens Athens Greece
4. Centre for Paediatric Gastroenterology International Academy for Paediatric Endoscopy Training, Sheffield Children's Hospital UK
5. Pediatric Gastroenterology Unit, Hospital Universitario Puerta de Hierro Majadahonda Universidad Autónoma de Madrid Spain
6. Department of Pediatrics, Saint Vincent de Paul Hospital, Groupement des Hôpitaux de l'Institut Catholique de Lille (GHICL) Catholic University Lille France
7. Department of Gastroenterology, Hepatology, and Nutrition, University Children's Hospital, Faculty of Medicine University of Ljubljana Ljubljana Slovenia
8. Alder Hey Children's NHS Foundation Trust Liverpool UK
9. Juliana Children's Hospital/Haga The Hague The Netherlands
10. Department of Woman Child and General and Specialized Surgery of the University of Campania “Luigi Vanvitelli” Naples Italy
11. CHC Mont Legia Liege Belgium
12. Epsom and St Helier University Hospitals NHS Trust UK
13. Pediatric Gastroenterology and Nutrition Department Hospital Infantil Universitario Niño Jesús Madrid Spain
14. Pediatric Gastroenterology Unit, Department of Pediatrics Severo Ochoa University Hospital Madrid Spain
15. Royal Free London NHS Foundation Trust London UK
16. Pediatric Gastroenterology, Hepatology and Nutrition Unit, Pediatrics Department, Hospital Universitari MútuaTerrassa Universitat de Barcelona Barcelona Spain
17. CHU Lille, Univ. Lille, Infinite Inserm Lille France
18. Kindergastro‐enterologie, hepatologie en nutritie, Brussels Centre for Intestinal Rehabilitation in Children (BCIRC) Belgium
19. University Children's Hospital Skopje, Faculty of Medicine, University Ss Cyril and Methodius Skopje Republic of North Macedonia
20. Childrens' Hospital, Helios Mariahilf Hospital Hamburg Germany
21. Endoscopy and Surgey Unit Bambino Gesu Children's Hospital Rome Italy
22. First Department of Pediatrics University of Athens and Pediatric Gastroenterology Unit Mitera Children's Hospital Athens Greece
23. Department of Human Pathology in Adulthood and Childhood “G. Barresi” University of Messina Messina Italy
24. Paediatric Gastroenterology Department Al Jalila Children's Specialty Hospital Dubai UAE
25. Mohammed Bin Rashid University of Medicine and Health Sciences Dubai UAE
26. Vilnius University Medical Faculty Clinic of Children's Diseases Vilnius Lithuania
27. Pediatric Gastroenterology Ghent University Hospital Belgium
28. Pediatric Gastroenterology Unit, Wolfson Medical Center Holon Israel
29. Eosinophilic Gastrointestinal Disease Clinic, Institute of Gastroenterology, Hepatology, and Nutrition, Schneider Children's Medical Center of Israel Israel