1. Department of Dermatology; Tübingen University Hospital; Tübingen Germany
2. Department of Dermatology, Venereology, and Allergology; University Hospital; Goethe-University; Frankfurt/M Germany
3. Department of Dermatology, Medical Faculty; University of Düsseldorf; Düsseldorf Germany
4. Clinics for Dermatology and Allergology; Justus-Liebig-University; Giessen Germany
5. Department of Dermatology and Allergology, HELIOS Hospital Wuppertal; Witten/Herdecke University; Germany
6. Department of Dermatology; University Hospital Münster; Germany
7. Department of Dermatology and Allergology; Ludwig-Maximilian University; Munich Germany
8. Department of Dermatology and UCD Charles Institute for Translational Dermatology; University College Dublin; Dublin Ireland