1. Department of Dermatology, Allergology, and Venereology University of Lübeck Lübeck Germany
2. Department of Dermatology, Venereology, and Allergology University Hospital Schleswig‐Holstein Kiel Germany
3. Department of Dermatology and Venerology University Hospital Hamburg‐Eppendorf Hamburg Germany
4. Department of Dermatology Elbe Medical Center Buxtehude Germany
5. Lübeck Institute of Experimental Dermatology (LIED) University of Lübeck Lübeck Germany
6. Institute of Medical Biometry and Statistics University of Lübeck Lübeck Germany
7. Institute of Social Medicine and Epidemiology University of Lübeck Lübeck Germany