1. Center for Inflammatory Skin Diseases, Department of Dermatology and Allergy University Hospital Schleswig-Holstein Campus Kiel Kiel Germany
2. Division of Immunodermatology and Allergy Research, Department of Dermatology and Allergy Hannover Medical School Hannover Germany
3. Center of Evidence-based Healthcare University Hospital and Medical Faculty Carl Gustav Carus, TU Dresden Dresden Germany
4. Department of Dermatology University Allergy Center, Medical Faculty Carl Gustav Carus, TU Dresden Germany
5. Clinics for Dermatology Elbe Klinikum Buxtehude Germany
6. Clinics and Outpatient Clinics for Dermatology and Allergy LMU Munich Germany
7. Occupational Dermatology, Department of Dermatology Ruprecht-Karls University Heidelberg Germany
8. Department of Dermatology Ruprecht-Karls University Heidelberg Germany
9. Practice Dr. med. Konstantin Ertner Nürnberg Germany
10. Practice Dr. med. Franca Wiemers Leipzig Germany
11. Practice Dr. med. Julia Wildberger, Hautmedizin, Bad Soden Germany
12. Clinics for Dermatology Venerology and Allergy Charité Berlin Germany
13. CMSS – Company for Medical Study and Service Selters Westerwald Germany
14. Department of Dermatology Hospital Rosenhoehe Bielefeld Germany
15. Practice Dr. med. Andrea Asmussen Dermatology at Lesum Bremen Germany
16. Institute for Health Services Research in Dermatology Hamburg University Medical Center Hamburg-Eppendorf Germany
17. Practice Dr. med. Anika Hünermund and Mario Pawlak Heilbad Heiligenstadt Germany
18. Department of Dermatology University Hospital, Friedrich-Alexander-University Erlangen-Nuernberg Germany
19. Department of Dermatology and Allergy, School of Medicine Technical University of Munich and Clinical Unit Allergology, Helmholtz Zentrum München, German Research Center for Environmental Health GmbH Germany
20. Clinics for Dermatology and Allergy University Hospital Aachen Germany
21. Practice Dr. med. Christiane Handrick Berlin Germany
22. Dermatology Clinic Helix Medical Excellence Center Mainz Germany
23. Practice Dr. med. Beate Schwarz Langenau Germany
24. Department of Dermatology and Allergy University Medical Center Mainz Germany
25. Practice Dr. med. Magnus Bell Thomas Kaiser Andernach Germany
26. Practice Dr. med. Sun-Hei Hong-Weldemann Freiburg Germany
27. Department of Dermatology Heinrich-Heine-University Duesseldorf Germany
28. Hautambulatorium Magdeburg Germany