1. Department of Dermatology and Phlebology Vivantes Klinikum im Friedrichshain Berlin Germany
2. Faculty of Medicine Charité – University Medicine Berlin Berlin Germany
3. Department of Medical Informatics Biometry and Epidemiology Friedrich‐Alexander‐University of Erlangen‐Nuremberg Erlangen Germany
4. Center for Dermatosurgery Havelklinik Berlin Germany
5. Department of Dermatology Venereology and Allergology University Hospital Würzburg Würzburg Germany
6. Department of Dermatology Venereology and Allergology University Medical Center Mannheim Heidelberg University Mannheim Germany
7. Department of Dermatology and Allergology Vivantes Klinikum Spandau Berlin Germany
8. Department of Dermatology Venereology and Allergology University Medical Center Göttingen Göttingen Germany