1. Skin and Allergy Hospital Helsinki University Hospital Helsinki Finland
2. Department of Dermatology and Allergy Charite Universitätsmedizin‐Berlin Berlin Germany
3. Department of Otorhinolaryngology University Hospital Ghent Belgium
4. Allergy Centre University Hospital Odense Denmark
5. Consiglio Nazionale delle Ricerche Rome Italy
6. University Hospital Montpellier France
7. Consiglio Nazionale delle Ricerche Palermo Italy
8. Allergy Centre University of Genoa Genoa Italy
9. Department of Dermatology and Allergy Biederstein and Division of Environmental Dermatology and Allergy Helmholtz Centre Technical University Munich Germany
10. Department of Respiratory Medicine Royal Brompton Hospital London UK
11. Department of Otorhinolaryngology Academic Medical Centre Amsterdam The Netherlands
12. Allergy Department 2nd Paediatric Clinic National and Kapodistrian University Athens Greece
13. Department of Clinical Immunology and Allergy Medical University of Lodz Lodz Poland
14. Allergy Centre Semmelweis Medical University Budapest Hungary
15. Department of Dermatology Medical University of Vienna Vienna Austria
16. Department of Pulmonology Allergy Centre Coimbra University Coimbra Portugal
17. Allergy Centre Ludwig Maximilians University Munich Germany
18. Allergy Centre Children′s University Hospital Zurich Switzerland
19. Department of Dermatology University Hospital Erlangen Erlangen Germany