1. Department of Dermatology Aarhus University Hospital Aarhus Denmark
2. Department of Dermatology and Allergy Ludwig‐Maximilian University Munich Germany
3. Hautklinik Thalkirchner Straße Staedtisches Klinikum Muenchen Muenchen Germany
4. Department of Dermatology and Allergy Herlev and Gentofte Hospital University of Copenhagen Hellerup Denmark