1. Nottingham Digestive Diseases Centre, Translational Medical Sciences, School of Medicine University of Nottingham Nottingham UK
2. Division of Gastroenterology and Hepatology Mayo Clinic Rochester Minnesota USA
3. Emma Children's Hospital‐Amsterdam UMC, Location University of Amsterdam, Pediatric Gastroenterology Amsterdam The Netherlands
4. Department of Psychiatry Harvard Medical School Boston Massachusetts USA
5. Department of Surgery and Cancer Imperial College NHS Trust London UK
6. G. Oppenheimer Center for Neurobiology of Stress at University of California, Los Angeles Los Angeles California USA
7. Vatche and Tamar Manoukian Division of Digestive Diseases David Geffen School of Medicine at University of California Los Angeles California USA
8. Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics Nationwide Children's Hospital Columbus Ohio USA
9. Department of Child and Adolescent Psychological Medicine University College London Hospitals NHS Foundation Trust London UK
10. Department of Pediatric Gastroenterology Erasmus MC‐Sophia Children's Hospital Rotterdam The Netherlands
11. Department of Pediatric Surgery, Emma Children's Hospital Amsterdam UMC location University of Amsterdam Amsterdam The Netherlands
12. Patient Representative London UK
13. Division of Pediatric Gastroenterology, Hepatology and Nutrition, Department of Pediatrics Medical College of Wisconsin Milwaukee Wisconsin USA
14. Division of Dietetics, Department of Internal Medicine Erasmus Medical Center Rotterdam The Netherlands
15. Division of Gastroenterology, Center for Motility and Functional Gastrointestinal Disorders Children's Hospital Boston Boston Massachusetts USA
16. Graduate Medical Education Cape Fear Valley Health Fayetteville North Carolina USA
17. Joan C Edwards School of Medicine Marshall University Huntington West Virginia USA
18. Department of Gastroenterology and Hepatology University of North Carolina Chapel Hill North Carolina USA
19. School of Social Work University of Washington Seattle Washington USA
20. Department of Gastroenterology and Gastrointestinal Physiology University College London Hospitals NHS Foundation Trust London UK
21. Division of Surgery and Interventional Science University College London London UK