1. Section of Allergology; Deparment of Internal Medicine; Erasmus MC; Rotterdam the Netherlands
2. Allergy Unit and Research Laboratory; Regional University Hospital of Malaga and Biomedical Research Institute of Malaga (IBIMA); Malaga Spain
3. Polyclinique de l'Ormeau; Tarbes France
4. Department of Dermatology; Universitair Ziekenhuis Brussel; Vrije Universiteit Brussel (VUB); Brussels Belgium
5. Children's Center; Bethel Clinic; Bielefeld Germany
6. Allergy Center; Ruhr University Bochum; Bochum Germany
7. Personalized Medicine; Asthma and Allergy Clinic - Department of Biomedical Sciences; Humanitas University and Research Center; Milan Italy
8. Clinic of Allergy and Asthma; Medical University Sofia; Sofia Bulgaria
9. Allergy Unit; Department of Dermatology; University Hospital of Zürich; Zürich Switzerland
10. Christine Kühne Center for Allergy Research and Education CK-CARE; Davos Switzerland
11. Department of General Otorhinolaryngology, H&NS; Medical University of Graz; Graz Austria
12. Division of Asthma, Allergy and Lung Biology; King's College London; London UK
13. Asthma-Allergiezentrum Leverkusen; Leverkusen Germany