1. Department Dermatology and Allergy; Ludwig-Maximilian University; Munich Germany
2. Klinik Thalkirchner Straße; Munich Germany
3. Department of Dermatology; Centre Hospitalier Universitaire CHU Nantes; Nantes France
4. Department of Dermatology and Allergy; Christine Kühne-Center for Allergy Research and Education; University Bonn; Bonn Germany
5. Pediatric Dermatology Unit; Departments of Dermatology and Pediatrics; Centre Hospitalier Universitaire Vaudois; Lausanne Switzerland
6. Department Dermatology; Aarhus University Hospital; Aarhus Denmark
7. European Federation of Allergy and Airways Diseases Patients’ Associations (EFA); Global Allergy and Asthma Patient Platform (GAAPP); Konstanz Germany
8. Department of Dermatology; University of Gießen and Marburg GmbH; Gießen Germany
9. Department of Psychosomatics and Psychotherapy; University of Gießen and Marburg GmbH; Gießen Germany
10. Department of Medicine; Section of Dermatology; University of Verona; Verona Italy
11. Pediatric Pneumology and Immunology; Universitätsmedizin Berlin; Berlin Germany
12. Centro di Specializzazione Regionale per lo Studio e la Cura delle Allergie e delle Intolleranze Alimentari presso l'Azienda Ospedaliera; Università di Padova; Padova Italy
13. Department of Dermatology; Medical University; Poznan Poland
14. Dermatological Practice; Immenstadt Germany
15. Allergy Unit; Department of Dermatology; University of Zurich; Zurich Switzerland
16. Christine Kühne Center for Allergy Research and Education CK-CARE; Davos Switzerland
17. Department Dermatology, Inselspital; Bern University Hospital; University of Bern; Bern Switzerland
18. Department of Dermatology; Heim Pál Children's Hospital; Budapest Hungary
19. Department of Dermatology, Venereology and Allergology; Wroclaw Medical University; Wroclaw Poland
20. Department of Dermatology and Pediatric Dermatology; Hôpital St André; Bordeaux France
21. Department of Dermatology; Hospital Niño Jesus; Madrid Spain
22. Department Dermatology and Allergy; Hannover Medical School; Hannover Germany
23. Department Dermatology and Allergy Biederstein; Technische Universität München; Munich Germany