1. Center for Dermatology Allergology and Dermatosurgery HELIOS University Hospital Wuppertal Witten/Herdecke University Wuppertal Germany
2. Psoriasis Center Department of Dermatology Venereology and Allergology University Hospital Schleswig‐ Holstein – Campus Kiel Germany
3. Department and Clinic for Dermatology University Hospital Carl Gustav Carus Dresden Germany
4. Department of Dermatology Venereology and Allergology University Hospital Frankfurt am Main Frankfurt Germany
5. Specialized Dermatological Practice Selters/Westerwald Germany
6. Department and Clinic for Dermatology and Allergology University Hospital Bonn Germany