1. Center for Rhinology and Allergology Wiesbaden; Department of Otorhinolaryngology, Head and Neck Surgery; University Hospital Mannheim; Mannheim Germany
2. Département de Pneumologie et Addictologie; Hôpital Arnaud de Villeneuve; University Hospital of Montpellier; Montpellier France
3. Sorbonne Universités; UPMC Paris 06, UMR-S 1136, IPLESP; Equipe EPAR; Paris France
4. Section of Allergology; Department of Internal Medicine; Erasmus MC; Rotterdam the Netherlands
5. Second University of Naples and Institute of Translational Pharmacology; Italian National Research Council (IFT-CNR); Rome Italy
6. 1018, Respiratory and Environmental Epidemiology Team; INSERM; CESP Centre for research in Epidemiology and Population Health; Villejuif France
7. Respiratory Diseases & Allergy Clinic; University of Genova; IRCCS AOU San Martino; Genova Italy
8. Section of Allergy and Clinical Immunology; National Heart and Lung Institute; Imperial College; London UK
9. ALC, Allergy Learning and Consulting; Copenhagen Denmark
10. Allergy Clinic; University Hospital Gentofte; Copenhagen Denmark
11. Institute of Medical Statistics; Informatics and Epidemiology (IMSIE); University of Cologne; Cologne Germany
12. Allergy Department; 2nd Pediatric Clinic; University of Athens; Athens Greece
13. Centre for Paediatrics and Child Health; Institute of Human Development; University of Manchester; Manchester UK
14. Department of Respiratory Medicine and Allergology; Sahlgrenska University Hospital; Goteborg Sweden
15. Department of Allergy; Niño Jesús University Hospital; Madrid Spain
16. Department of Clinical Allergology and Pulmonary Diseases; University of Turku; Finland
17. Suomen Terveystalo Allergy Clinic; Turku Finland
18. Department for Pediatric Pneumology and Immunology; Charité Medical University; Berlin Germany