1. Department of Paediatrics OLVG Hospital Amsterdam The Netherlands
2. Internal Medicine Allergology & Clinical Immunology Erasmus MCUniversity Medical Centre Rotterdam Rotterdam The Netherlands
3. Paediatric Allergology Sophia Children HospitalErasmusMCUniversity Medical Centre Rotterdam Rotterdam The Netherlands
4. National Heart & Lung Institute Imperial College London London UK
5. Pediatric UnitFondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico Milan Italy
6. Department of Clinical Sciences and Community Health Università degli Studi di Milano Milan Italy
7. University Child HealthUniversity of SouthamptonSouthampton General Hospital Southampton UK
8. Food Allergy Referral Centre Department of Woman and Child Health Padua University Hospital Padua Italy
9. Department of Internal Medicine, Allergology University Medical Centre Groningen Groningen The Netherlands
10. Interuniversity Messerli Research InstituteComparative MedicineUniversity of Veterinary Medicine and Medical University Vienna Vienna Austria
11. Institute of Pathophysiology and Allergy Research Center for Pathophysiology, Infectiology and Immunology Medical University of Vienna Vienna Austria
12. University Children's Hospital Zurich Zurich Switzerland
13. Christine Kühne‐Center for Allergy Research and Education (CK‐CARE) Davos Switzerland
14. Children's Hospital of Eastern Switzerland St Gallen Switzerland
15. Department of Immunology and Allergy University Children's Hospital Zurich Zurich Switzerland
16. Department of Allergy & Clinical Immunology Royal Brompton & Harefield NHS Foundation Trust London UK
17. Swiss Institute of Allergy and Asthma Research (SIAF) University of Zurich Davos Switzerland
18. Section of Allergy and Immunology Children’s Hospital ColoradoUniversity of Colorado Denver Colorado USA
19. Department of Medicine and Microbiology APC Microbiome IrelandNational University of Ireland Cork Ireland
20. Krefting Research Centre Institute of Medicine University of Gothenburg Gothenburg Sweden