1. Institute for Health Services Research in Dermatology and Nursing (IVDP) University Medical Center Hamburg‐Eppendorf (UKE) Hamburg Germany
2. Clinic for Dermatology and Allergology St. Joseph Hospital Clinical Center of the Ruhr University Bochum Bochum Germany
3. Clinic for Dermatology and Allergology University Hospital Marburg (UKGM) Marburg Germany
4. Department of Dermatology Venereology and Allergology Goethe University Frankfurt Frankfurt am Main Germany
5. Clinic for Dermatology Allergology and Phlebology Klinikum am Gesundbrunnen / SLK‐Kliniken Heilbronn GmbH Heilbronn Germany
6. Clinic for Dermatology Venerology and Allergology Saarland University Hospital and Medical Faculty of Saarland University Homburg Germany
7. Department of Dermatology Venereology and Allergology University Hospital Leipzig Leipzig Germany
8. Private dermatological practice Fuistingstrasse 4 Ahaus Germany
9. Department of Dermatology and Allergology Augsburg University Hospital Augsburg Germany
10. Clinic for Dermatology Dermatosurgery and Allergology Asklepios Klinik Weißenfels Weißenfels Germany
11. Department of Dermatology and Allergology Friedrich Schiller University Jena Germany
12. Department of Dermatology Skin Tumor Center Ludwigshafen Medical Center Ludwigshafen Germany
13. Department of Dermatology and Allergology Biederstein Technical University of Munich (TUM) Munich Germany