1. Allergy Unit Department of Pediatric Medicine Meyer Children’s Hospital Florence Italy
2. Allergy Unit Infanta Leonor University Hospital Madrid Spain
3. Pediatric Allergy Unit Department of Child and Adolescent Geneva University Hospital Geneva Switzerland
4. Département de Pneumologie et Addictologie Centre Hospitalier Universitaire de Montpellier Hôpital Arnaud de Villeneuve, univ Montpellier Montpellier France
5. Institut Pierre‐Louis D’épidémiologie et de Santé Publique Équipe EPAR Sorbonne UniversitéINSERM Paris France
6. Children’s Allergy Service Evelina Children's Hospital, Guy’s and St Thomas’ London UK
7. Women and Children’s Health School of Life Course Sciences Faculty of Life Sciences and Medicine King’s College London London UK
8. Allergy Department Centro Hospitalar Universitário do Porto Porto Portugal
9. Department of Pediatric Allergy and Immunology Faculty of Medicine Mersin University Mersin Turkey
10. IRCCS Oasi Maria S.S. Troina Italy
11. Fondazione Mediterranea G.B. Morgagni Italy
12. Department of Pediatric Allergy School of Medicine Hacettepe University Ankara Turkey
13. Department of Paediatrics Faculty of Medicine School of Medicine University of Ioannina Ioannina Greece
14. Faculty of Medicine University Children's HospitalUniversity of Belgrade Belgrade Serbia