1. Department of Dermatology and Allergy Technical University of Munich Munich Germany
2. Department of Dermatology University Hospital Muenster Muenster Germany
3. Department of Dermatology Medical Faculty, Heinrich‐Heine University Duesseldorf Germany
4. Division of Dermatology and Venereology, Department of Medicine, Solna Karolinska Institutet Stockholm Sweden
5. Center for Molecular Medicine Karolinska Institutet Stockholm Sweden
6. Unit of Dermatology Karolinska University Hospital Stockholm Sweden
7. Dermatology Department, University Hospital Zurich and Medical Faculty University of Zurich Zurich Switzerland
8. Department of Dermatology, Lausanne University Hospital (CHUV) and Faculty of Biology and Medicine University of Lausanne Lausanne Switzerland
9. Department of Dermatology and Venerology, Medical Center University of Freiburg Freiburg Germany