1. Institute for Health Services Research in Dermatology and Nursing (IVDP) University Medical Center Hamburg‐Eppendorf (UKE) Hamburg Germany
2. Institute and Comprehensive Center for Inflammation Medicine University of Lübeck Lübeck Germany
3. Psoriasis Center Kiel, Department of Dermatology Venereology and Allergology University Medical Center Schleswig‐Holstein Kiel Germany
4. Department of Dermatology and Allergy University Medical Center Mainz Mainz Germany
5. Dermatological Practice Selters Selters Germany