Affiliation: | 1. Department of Dermatology, Zürich University Hospital, Gloriastraße 31, 8091 Zürich, Switzerland;2. Department of Immunology, Zürich University Hospital, Gloriastraße 31, 8091 Zürich, Switzerland;3. Department of Dermatology and Allergy Biederstein, Technische Universität Mönchen, Munich, Germany;4. Departments of Dermatology and Allergology, Philipps University Marburg, Marburg, Germany;5. Department of Dermatology, University of Lübeck, Lübeck, Germany;6. Department of Dermatology, Eberhard Karls University of Tübingen, Tübingen, Germany;7. Istituto Dermopatico dell'Immacolata, IDI‐IRCCS, Rome, Italy;8. Ospedale Regionale di Bellinzona e Valli, Bellinzona, Switzerland;9. Department of Dermatology, Bern University Hospital, Bern, Switzerland;10. Lars E. French.;11. E‐mail: |