1. Department of Dermatology; Johannes Wesling Klinikum; Minden Germany
2. Department of Dermatology; HELIOS Klinikum; Krefeld Germany
3. Department of Dermatology, Venereology, and Allergology; Mannheim University Hospital; Germany
4. Department of Dermatology; Dortmund Hospital; Germany
5. Department of Dermatology, Venereology, and Allergology; University Hospital Schleswig-Holstein (UKSH); Campus Kiel Germany
6. Department of Dermatology; Zürich University Hospital; Switzerland
7. Department of Dermatology; Venereology, and Allergology, Charité - Universitätsmedizin Berlin; Germany