1. Institute for Health Services Research in Dermatology and Nursing University Medical Center Hamburg‐Eppendorf (UKE) Hamburg Germany
2. Psoriasis‐Center Clinic for Dermatology Venereology and Allergology University Medical Center Schleswig‐Holstein/Campus Kiel Kiel Germany
3. Department of Dermatology Venereology and Allergology Charité – Universitätsmedizin Berlin corporate member of Freie Universität Berlin and Humboldt‐ Universität zu Berlin Berlin Germany
4. Department of Dermatology Venerology and Allergology University Medical Center Göttingen Göttingen Germany
5. Department of Dermatology University Hospital Basel Basel Switzerland
6. Department of Dermatology Venereology and Allergology Goethe University Frankfurt am Main Germany
7. Department of Dermatology Heidelberg University Hospital Heidelberg Germany
8. Department of Dermatology University Medical Center Mainz Mainz Germany
9. Deutsches Zentrum Immuntherapie Department of Dermatology, Friedrich‐ Alexander University Friedrich‐Alexander University Erlangen‐Nuermberg Erlangen Germany
10. Institute and Comprehensive Center for Inflammation Medicine University Hospital Schleswig‐Holstein, Campus Lübeck Lübeck Germany
11. Department of Dermatology and Allergy University Hospital Bonn Bonn Germany