1. Department of Dermatology, Venereology and Allergology University Medical Center Göttingen Germany
2. Department of Dermatology University Medical Center Mannheim Mannheim Germany
3. Department of Dermatology University Hospital Frankfurt Frankfurt am Main Germany
4. Psoriasis Center Department of Dermatology University Hospital Schleswig‐Holstein Kiel Germany
5. Faculty of Economic Sciences Göttingen University Göttingen Germany
6. Department of Dermatology and Allergy University Bonn Bonn Germany