1. German Center for Health Services Research in Dermatology Institute for Health Services Research in Dermatology and Nursing (IVDP) University Medical Center Hamburg‐Eppendorf (UKE) Hamburg Germany
2. Department of Dermatology Psoriasis‐Center University Medical Center Schleswig‐Holstein, Kiel Campus Kiel Germany
3. Clinic and Polyclinic for Dermatology and Allergology University Hospital Bonn Bonn Germany
4. Eli Lilly and Company Indianapolis Indiana USA
5. Department of Dermatology Medical University of Vienna Vienna Austria
6. HaaPACS GmbH Schriesheim Germany
7. Center for Innovative Diagnostics and Therapy Rheumatology/Immunology (CIRI) of the University of Frankfurt Frankfurt am Main Germany
8. Department of Dermatology Venereology and Allergology University Hospital Frankfurt Frankfurt am Main Germany