1. Department of Dermatology, Venereology and Allergology University Medical Center Göttingen Göttingen Germany
2. Information Network of Departments of Dermatology Institute at the University Medical Center Göttingen Göttingen Germany
3. Department of Dermatology, Venereology and Allergology St. Josef Hospital University Medical Center of the Ruhr University Bochum (UK RUB) Bochum Germany
4. Department of Occupational Dermatology BG Hospital Falkenstein Falkenstein Germany
5. Institute for Interdisciplinary Dermatological Prevention and Rehabilitation (iDerm) BG Hospital Hamburg Hamburg Germany
6. Department of Allergology, Photodermatology and Occupational DermatologyDermatologikum Hamburg Hamburg Germany
7. Institute for Interdisciplinary Dermatological Prevention and Rehabilitation (iDerm) at the University of Osnabrück Osnabrück Germany
8. Department of Dermatology, Environmental Medicine and Health Theory University of Osnabrück Osnabrück Germany
9. Lower Saxony Institute of Occupational Dermatology University of Osnabrück Osnabrück Germany
10. Department of Dermatology, Venereology and Allergology University Medical Center Halle Martin Luther University Halle‐Wittenberg Halle (Saale) Germany
11. Department of Dermatology, Venereology and Allergology University Medical Center Aachen Aachen Germany
12. Lower Saxony Institute of Occupational Dermatology University of Göttingen Göttingen Germany