1. Department of Dermatology, Venereology, and Allergology; University Hospital Schleswig-Holstein, Campus Kiel; Kiel Germany
2. Department of Dermatology, and National Cancer Center; University Hospital Heidelberg; Heidelberg Germany
3. Department of Dermatology; University Hospital Erlangen; Erlangen Germany
4. Department of Dermatology, Medical Faculty; University of Mainz; Mainz Germany
5. Department of Dermatology, Venereology, and Allergology; University Medicine Göttingen; Göttingen Germany
6. Department of Dermatology, Venereology and Allergology; University Hospital Essen; Essen Germany
7. Hanover Skin Cancer Center, Department of Dermatology, Venereology, and Allergology; Hanover Medical College; Hanover Germany