1. Department of Dermatology University of Leipzig Leipzig Germany
2. Department of Dermatology University of Erlangen Ulmenweg 18 D‐91054 Erlangen Germany
3. Center for Clinical Trials University of Leipzig Leipzig Germany
4. Department of Dermatology University of Graz Graz Austria
5. Department of Dermatology University of Kiel Kiel Germany
6. Department of Dermatology University of Marburg Marburg Germany
7. Department of Dermatology University of Dresden Dresden Germany
8. Department of Dermatology University of Ulm Ulm Germany
9. Department of Dermatology Charité‐Medical University Berlin Berlin Germany
10. Department of Dermatology University Münster Münster Germany
11. Department of Dermatology University of Mannheim Mannheim Germany
12. Department of Dermatology University of Lübeck Lübeck Germany
13. Department of Dermatology Medical University Hannover Germany
14. Department of Dermatology University of Würzburg Würzburg Germany