1. Sorbonne Université, INSERM, Institut Pierre Louis d'Epidémiologie et de Santé Publique, AP‐HP. Sorbonne Université, Hôpital Tenon, Service de dermatologie et allergologie Paris France
2. Allergy Clinic, Department of Dermatology and Allergy Herlev and Gentofte Hospital Copenhagen Denmark
3. Department of Clinical Medicine University of Copenhagen Copenhagen Denmark
4. Allergy Unit Regional University Hospital of Malaga‐IBIMA‐UMA‐ARADyAL Malaga Spain
5. Allergy Unit, Allergo‐Anaesthesia Unit, Faculty of Medicine, Hospital Central de la Cruz Roja Alfonso X El Sabio University, ARADyAL, REI Madrid Spain
6. Immunology Unit University Hospital of Verona, Policlinico G.B. Rossi Verona Italy
7. Allergy Unit University Hospital of Verona, Policlinico G.B. Rossi Verona Italy
8. Allergy and Dermatology, Cantonal Hospital Aarau Cantonal Hospital Aarau Aarau Switzerland
9. Department of Biomedicine University of Basel Basel Switzerland
10. Allergy Unit University Hospital of Montpellier and IDESP, UMR UA11, Univ. Montpellier – INSERM Montpellier France
11. Hospital Lusíadas Porto Portugal
12. Centro Hospitalar Universitário H. S. João Porto Portugal
13. Department of Women‐Children‐Teenagers University Hospital of Geneva Geneva Switzerland
14. Department of Dermatology and Allergy Biederstein Technical University of Munich, Faculty of Medicine and Health Munich Germany