1. Center of Evidence‐Based Healthcare University Hospital Carl Gustav Carus and Carl Gustav Carus Faculty of Medicine Technische Universität Dresden Dresden Germany
2. Department of Dermatology University Allergy Center Carl Gustav Carus Faculty of Medicine Technische Universität Dresden Dresden Germany
3. Department of Dermatology and Allergy Hannover Medical School Hannover Germany
4. Center for Inflammatory Skin Diseases Department of Dermatology and Allergy University Hospital Schleswig‐Holstein Campus Kiel Kiel Germany
5. Practice Dr. med. Magnus Bell Andernach Germany
6. Hautmedizin Bad Soden Studienzentrum Bad Soden Germany
7. Department of Dermatology Allergy and Venereology Charité – Universitätsmedizin Berlin Berlin Germany
8. Practice Dr. med. Christiane Handrick Berlin Germany
9. Department of Dermatology OWL University Hospital of Bielefeld University Campus Clinic Bielefeld Bielefeld Germany
10. Practice Dr. med. Andrea Asmussen Dermatology at Lesum Bremen Germany
11. Clinics for Dermatology Elbe Klinikum Buxtehude Germany
12. Department of Dermatology and Allergology University Hospital Duesseldorf Düsseldorf Germany
13. Department of Dermatology University German Center for Immunotherapy Erlangen Germany
14. Practice Dr. med. Sung‐Hei Hong‐Weldemann Freiburg im Breisgau Germany
15. Institute for Health Services Research in Dermatology Hamburg University Medical Center Hamburg Eppendorf Hamburg Germany
16. Division of Occupational Dermatology Department of Dermatology Ruprecht‐Karls University Heidelberg Germany
17. Department of Dermatology University Hospital Heidelberg Germany
18. Practice Dr. med. Thomas Schaefer/ Dr. med. Doreen Belz Derma Koeln Köln Germany
19. Practice Dr. med. Beate Schwarz Langenau Germany
20. Practice Dr. med. Franca Wiemers Leipzig Germany
21. Practice Dr. med. Jens‐Joachim Brücher Hautambulatorium Magdeburg Magdeburg Germany
22. Dermatology Clinic Helix Medical Excellence Center Mainz Mainz Germany
23. Clinics and Outpatient Clinics for Dermatology and Allergy LMU Munich München Germany and Vrije Universiteit Brussel Universitair Ziekenhuis Department of Dermatology Brussels Belgium
24. Department of Dermatology and Allergy School of Medicine Technical University of Munich München Germany
25. Practice Dr. med. Konstantin Ertner Nürnberg Germany
26. Focus Practice for chronic inflammatory dermatoses skin cancer and allergology and also Study Center CMS3 (Company for Medical Study and Service) Selters/Westerwald Germany