1. Information Network of Departments of Dermatology (IVDK) Institute at the University Medical Center Göttingen Göttingen Germany
2. Department of Dermatology, Venereology and Allergology, St. Josef Hospital University Medical Center, Ruhr University Bochum Bochum Germany
3. Institute for Interdisciplinary Dermatologic Prevention and Rehabilitation (iDerm) at the University of Osnabrück Osnabrück Germany
4. Dermatologic Center BG Klinikum Hamburg Hamburg Germany
5. Institute for Prevention and Occupational Medicine of the German Social Accident Insurance Institute of the Ruhr University Bochum (IPA) Bochum Germany
6. Department of Dermatology Inselspital, Bern University Hospital, University of Bern Bern Switzerland
7. Occupational Dermatology, Department of Dermatology Ruprecht‐Karls University Heidelberg Heidelberg Germany
8. Department of Dermatology University Hospital Zurich Zurich Switzerland
9. Department of Dermatology, Environmental Medicine, and Health Theory University of Osnabrück Osnabrück Germany
10. Department of Dermatology University Allergy Center, University Hospital Carl Gustav Carus, Technical University Dresden Dresden Germany
11. Department of Dermatology SLK Hospital Heilbronn Heilbronn Germany