1. Division of Dermatology and Venereology, Department of Medicine Solna, and Center for Molecular Medicine Karolinska Institutet Stockholm Sweden
2. Department of Dermatology and Allergy Technical University of Munich, School of Medicine Munich Germany
3. Dermatology and Venerology Unit, Department of Medicine Solna Karolinska University Hospital Stockholm Sweden
4. Dermatology Unit University of Campania “Luigi Vanvitelli” Naples Italy