1. Department of Paediatrics UZ Brussel Vrije Universiteit Brussel Brussels Belgium
2. Department of Paediatrics Emma Children's Hospital/AMC Amsterdam The Netherlands
3. Department of Paediatrics University Hospital Cologne Cologne Germany
4. Nutrition and Dietetics Deptartment Chelsea and Westminster NHS Healthcare Foundation London UK
5. Department of Paediatrics Faculty of Medicine Jeanne de Flandre University Hospital CHRU Lille University of Lille Lille France
6. Department of Translational Medical Science Section of Paediatrics University of Naples Federico II Naples Italy
7. Department of Pediatrics Section of Gastroenterology, Hepatology and Transplantation Hospital Italiano Buenos Aires Argentina
8. Department of Neuroscience, Pharmacology and Child Health University of Florence‐Meyer Children's Hospital Florence Italy
9. Department of Gastroenterology, Hepatology and Nutrition University Children's Hospital Ljubljana Slovenia
10. First Department of Paediatrics University of Athens Children's Hospital ‘Agia Sofia’ Athens Greece
11. Paediatric Gastroenterology and Hepatology Unit La Fe University Hospital Valencia Spain
12. APHP‐Hôpital Necker Enfants Malades Service de Gastroenterologie Pédiatrique Paris France
13. Faculté de Médecine Université Sorbonne Paris Cité – Paris Descartes Paris France
14. Paediatric Department University of Insubria Varese Italy
15. Sackler Faculty of Medicine Schneider Children's Medical Centre of Israel Tel‐Aviv University Tel‐Aviv Israel
16. Paediatric Center Clinique des Grangettes and Centre Médical Universitaire Geneva Switzerland
17. Department of Paediatrics The Medical University of Warsaw Warsaw Poland
18. Gastroenterology Unit Great Ormond Street Hospital and UCL Institute of Child Health London UK
19. Paediatric Gastroenterology Hadassah Hebrew University Medical Center Jerusalem Israel