1. Department of Internal Medicine Israelitic Hospital Academic Hospital University of Hamburg Hamburg Germany
2. Department of Internal Medicine Division of Gastroenterology and Hepatology Medical University of Graz Graz Austria
3. NIHR Southampton Biomedical Research Centre University Hospital Southampton NHS Foundation Trust and University of Southampton Southampton UK
4. Department of Pediatric Gastroenterology, Hepatology and Nutrition Emma Children's Hospital Amsterdam UMC University of Amsterdam Amsterdam The Netherlands
5. UCL Great Ormond Street Institute of Child Health and Department of Gastroenterology Neurogastroenterology and Motility Great Ormond Street Hospital London UK
6. Department of Gastroenterology and Hepatology University Hospital of Santiago de Compostela Santiago Spain
7. Clinica Medicala 2 Cluj‐Napoca Romania
8. Department of Medicine II Division of Hepatology University Hospital Würzburg Würzburg Germany
9. Department of Upper GI Diseases Karolinska University Hospital Stockholm Sweden
10. Department of Paediatric Gastroenterology, Hepatology and Nutrition KidZ Health Castle UZ Brussels Brussels Belgium
11. Division of Gastroenterology and Hepatology University Hospital Zürich Zürich Switzerland
12. Pediatric Department Hospital "F. Del Ponte" University of Insubria Varese Italy
13. Clinic for General Medicine, Gastroenterology, and Infectious Diseases Augustinerinnen Hospital Cologne Germany
14. Department of Gastroenterology, Hepatology and Liver Transplantation Queensland Children's Hospital Brisbane Australia
15. Translational Research Center for Gastrointestinal Disorders KU Leuven Leuven Belgium
16. Digestive Function: Basel, Laboratory and Clinic for Motility Disorders and Functional Gastrointestinal Diseases Centre for Integrative Gastroenterology Klinik Arlesheim Arlesheim Switzerland