1. Information Network of Departments of Dermatology (IVDK) Institute at the University Medical Center Göttingen Göttingen Germany
2. Allergy and Immunology, Department of Dermatology and Allergy Charité—Universitätsmedizin Berlin Berlin Germany
3. Department of Dermatology, Venereology and Allergology St. Josef Hospital, University Medical Center, Ruhr University Bochum Bochum Germany
4. Department of Dermatology Erlangen University Hospital, Friedrich‐Alexander University of Erlangen‐Nürnberg (FAU) Erlangen Germany
5. Institute for Interdisciplinary Dermatologic Prevention and Rehabilitation (iDerm) at the University of Osnabrück Osnabrück Germany
6. Department of Dermatology, Environmental Medicine, and Health Theory University of Osnabrück Osnabrück Germany
7. Dermatologic Center BG Klinikum Hamburg Hamburg Germany
8. Department of Dermatology University Allergy Center, University Hospital Carl Gustav Carus, Technical University Dresden Dresden Germany
9. Department of Dermatology and Allergology Academic Teaching Hospital Dresden‐Friedrichstadt Dresden Germany