1. Unit of Pediatric Allergy & Pulmonology; Children's Hospital La Fe, and Instituto de Investigacion La Fe; Valencia Spain
2. Depatment of Pediatric Pneumology and Immunology; Charité Universitatsmedizin; Berlin Germany
3. Experimental Pneumology; BGFA-XU18, Ruhr-University Bochum; Germany
4. Pediatric Allergy Unit; University Hospitals of Geneva; Geneva Switzerland
5. Hans Christian Andersen Children's Hospital; Odense University Hospital; Odense Denmark
6. Astrid Lindgren Children's Hospital and Centre for Allergy Research; Karolinska University Hospital; Stockholm Sweden
7. Paediatrics and Child Health; University College Cork; Cork Ireland
8. Allergology Department, Centre de l'Asthme et des Allergies; Hôpital d'Enfants Armand-Trousseau - INSERM, UMR_S 1136, Sorbonne Universités, UPMC Univ Paris 06, Institut Pierre Louis d'Epidémiologie et de Santé Publique, Equipe EPAR; Paris France
9. King's College London, King's Health Partners, MRC & Asthma UK Centre in Allergic Mechanisms of Asthma, and the Department of Paediatric Allergy; Guy's and St Thomas’ NHS Foundation Trust; London UK
10. The Food Allergy Referral Centre Veneto Region, Department of Women and Child Health; University of Padua; Padua Italy
11. Allergy Department, 2 Pediatric Clinic; National & Kapodistrian University of Athens; Athens Greece
12. Centre for Paediatrics and Child Health, Institute of Human Development; University of Manchester; Manchester UK
13. University of Southampton, Southampton; David Hide Asthma and Allergy Research Centre, Isle of Wight; and NIHR Respiratory Biomedical Resaerch Unit; University Hospital Southampton NHS Foundation Trust; Southampton UK
14. Centre for Respiratory Medicine and Allergy, Institute of Inflammation and Repair; University of Manchester & University Hospital of South Manchester; Manchester UK
15. Terveystalo Turku, Allergy Clinic; University of Turku; Turku Finland
16. Department of Dermatology, Venereology and Allergy; University Hospital Schleswig-Holstein; Kiel Germany
17. Sachs’ Children's Hospital; Institute of Environmental Medicine; Karolinska Institutet; Stockholm Sweden