1. Department of Dermatology Psoriasis‐Center University Medical Center, Schleswig‐Holstein (Campus Kiel) Kiel Germany
2. Department of Dermatology Radboud University Nijmegen Medical Centre Nijmegen The Netherlands
3. Department of Dermatology Århus University Hospital Århus Denmark
4. Division of Dermatology Dalhousie University Halifax NS Canada
5. Division of Evidence Based Medicine Klinik für Dermatologie, Venerologie und Allergologie Charité‐Universitätsmedizin Berlin Berlin Germany
6. Hospital de la Santa Creu i Sant Pau Universitat Autònoma de Barcelona Barcelona Spain
7. Dermatologikum Hamburg Hamburg Germany
8. Centre for evidence‐based healthcare Technische Universität Dresden Germany
9. Dermatology Centre Manchester Academic Health Sciences Centre Salford Royal Foundation Trust the University of Manchester Manchester UK