1. Department of Dermatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
2. Department of Dermatology, Cantonal Hospital St. Gallen, St. Gallen, Switzerland
3. Department of Dermatology, University Hospitals Birmingham, Birmingham, UK
4. Department of Dermatology, Kepler University Hospital, Linz, Austria
5. Department of Immunology, Medical University of Warsaw, Warsaw, Poland
6. Department of Dermatology, Lausanne University Hospital CHUV, University of Lausanne, Lausanne, Switzerland