1. Department of Dermatology Aarhus University Hospital Aarhus Denmark
2. Department of Dermatology and Allergy Herlev and Gentofte Hospital University of Copenhagen Hellerup Denmark
3. Department of Dermatology CHU Nantes Nantes France
4. Department of Dermatology Larrey Hospital Toulouse University Toulouse France
5. Department of Dermatology and Allergology Biederstein Technical University of Munich Munich Germany
6. Christiane‐Kühne Center for Allergy Research and Education (CK‐Care) Davos Switzerland
7. Department of Dermatology and Allergy Ludwig‐Maximilian University Munich Germany
8. Hautklinik Thalkirchner Straße Staedtisches Klinikum Muenchen Munich Germany