1. Information Network of Departments of Dermatology (IVDK) Institute at the University Medical Center Göttingen Göttingen Germany
2. Lower‐Saxonian Institute of Occupational Dermatology Georg‐August University Göttingen Germany
3. University of Osnabrück Osnabrück Germany
4. Institute for Interdisciplinary Dermatologic Prevention and Rehabilitation (iDerm) University of Osnabrück Osnabrück Germany
5. Department of Dermatology, Environmental Medicine and Health Theory University of Osnabrück Osnabrück Germany
6. Department of Dermatology, Venereology and Allergology University Medical Center Göttingen Göttingen Germany
7. Hautarztpraxis Elmshorn Elmshorn Germany