1. Department of GastroenterologyHospital General de TomellosoServicio de Salud de Castilla‐La ManchaTomellosoSpain
2. Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd)MadridSpain
3. Department of GastroenterologyHospital San Pedro de AlcantaraCaceresSpain
4. Research Support UnitHospital General Mancha CentroAlcázar de San JuanSpain
5. Department of GastroenterologyHepatology and Infectious DiseasesOtto von Guericke UniversityMagdeburgGermany
6. Department of Gastroenterology and HepatologyAcademic Medical CentreAmsterdamthe Netherlands
7. Pathologie ViollierBaselSwitzerland
8. Department of PediatricsHospital S. JoãoPortoPortugal
9. Department of ENTHead and Neck SurgeryNÄL Medical CentreTrollhättanSweden
10. Department of AllergyHospital General de TomellosoTomellosoSpain
11. Center for Digestive DiseasesInternal Medicine Center EppendorfHamburgGermany
12. Division of Pediatric Gastroenterology and HepatologyAthens Children’s Hospital “Agia Sofia”University of AthensAthensGreece
13. Department of GastroenterologyHospital General Universitario de Ciudad RealCiudad RealSpain
14. University Department of PediatricsChildren’s Hospital – Spedali CiviliBresciaItaly
15. Center for Life Course Health ResearchUniversity of OuluTornioFinland
16. Gastroenterology UnitHospital Universitario de La PrincesaInstituto de Investigación Sanitaria Princesa (IIS‐IP)MadridSpain
17. Division of Gastroenterology and HepatologyCentre Hospitalier Universitaire Vaudois et Université de LausanneLausanneSwitzerland
18. Center of EndoscopyStarnbergGermany
19. Department of ENTAmsterdam Medical CentreAmsterdamthe Netherlands
20. Swiss EoE ClinicsOltenSwitzerland
21. Department of Health Services ResearchDurham UniversityUK