1. Division of Gastroenterology and Hepatology, First Department of Pediatrics University of Athens, Children's Hospital Agia Sofia Athens Greece
2. Hospital Lusíadas Porto Portugal
3. Paediatric Gastroenterology, Hepatology and Nutrition Alder Hey Children's NHS Foundation Trust and University of Liverpool Liverpool UK
4. Mount Sinai Center for Eosinophilic Disorders Icahn School of Medicine at Mount Sinai New York NY
5. Division of Pathology and Laboratory Medicine, Cincinnati Children's Hospital Medical Center University of Cincinnati College of Medicine Cincinnati OH
6. Community Health Network; and Section of Pediatric Gastroenterology, Hepatology and Nutrition, Riley Hospital for Children Indiana University Indianapolis IN
7. Pediatric Gastroenterology Unit, University Hospital Puerta de Hierro Majadahonda Autonomous University of Madrid Madrid Spain
8. Department of Gastroenterology, Hepatology and Nutrition Ljubljana University Children's Hospital Ljubljana Slovenia
9. Center for Pediatric Gastroenterology Hospital Pequeno Príncipe Curitiba Brazil
10. Institute of Gastroenterology, Nutrition, and Liver Diseases Schneider Children's Medical Center of Israel Petach Tikva Israel
11. Faculty of Medicine, Tel‐Aviv University Tel‐Aviv Israel
12. Department of Pediatrics University of Colorado School of Medicine Aurora CO
13. Department of Gastroenterology Amsterdam University Medical Centers Amsterdam the Netherlands
14. Centro Hospitalar Universitário de São João (CHUSJ)/Faculty of Medicine of the University of Porto (FMUP) and Institute of Molecular Pathology and Immunology of the University of Porto (Ipatimup)/i3S – Instituto de Investigação e Inovação em Saúde da Universidade do Porto Porto Portugal
15. Center for Esophageal Diseases and Swallowing, Division of Gastroenterology and Hepatology University of North Carolina School of Medicine Chapel Hill NC
16. Division of Gastroenterology & Hepatology Northwestern University, Feinberg School of Medicine Chicago IL
17. Digestive Health Institute and Section of Pediatric Gastroenterology, Hepatology and Nutrition, Gastrointestinal Eosinophilic Disease Program, Children's Hospital Colorado, Department of Pediatrics University of Colorado School of Medicine Aurora CO
18. Dr. von Hauner Children's Hospital, Department of Pediatrics University Hospital, LMU Munich Munich Germany
19. Department of Pediatrics, Gastroenterology and Nutrition School of Medicine Collegium Medicum University of Warmia and Mazury Olsztyn Poland
20. Center for Pediatric Eosinophilic Diseases, The Children's Hospital of Philadelphia, Perelman School of Medicine University of Pennsylvania Philadelphia PA
21. The Ottawa Hospital IBD Center Ottawa ON Canada
22. Ottawa Hospital Research Institute Clinical Epidemiology Program Ottawa ON Canada
23. Maternal and Child Health Department, Pediatric Gastroenterology and Liver Unit Sapienza – University of Rome Rome Italy
24. Department of Pediatrics and Adolescent Medicine Juntendo University Graduate School of Medicine Tokyo Japan
25. Division of Allergy and Immunology, Department of Pediatrics, Cincinnati Children's Hospital Medical Center University of Cincinnati College of Medicine Cincinnati OH
26. Department of Gastroenterology and Hepatology University Hospital Zürich Zürich Switzerland
27. Stem Cells and Regenerative Medicine, GOS Institute of Child Health University College London London UK
28. Gastroenterology, Hepatology and Liver Transplant Queensland Children's Hospital Brisbane Australia
29. School of Medicine University of Queensland Brisbane Australia
30. Woolworths Centre for Child Nutrition Research Queensland University of Technology Brisbane Australia
31. Department of Pathology Northwestern University, Feinberg School of Medicine Chicago IL
32. Digestive Health Institute, Section of Pediatric Gastroenterology, Hepatology and Nutrition, Children's Hospital Colorado, Gastrointestinal Eosinophilic Disease Program, Mucosal Inflammation Program University of Colorado School of Medicine Aurora CO