1. Technical University of Munich School of Medicine Department of Dermatology and Allergy Munich Germany
2. Division of Dermatology and Venereology Department of Medicine Solna and Center for molecular medicine Karolinska Institutet Stockholm Sweden
3. Department of Dermatology and Venereology University Medical Center Hamburg‐Eppendorf (UKE) Hamburg Germany
4. Centre for Translational Research in Inflammatory Skin Diseases Institute for Health Services Research in Dermatology and Nursing University Medical Center Hamburg‐Eppendorf Hamburg Germany
5. Dermatology Office and Dermatology Study Center (CMS3) Dr. Ralph von Kiedrowski Selters/Westerwald Germany