1. Department of Medical Informatics, Biometry and Epidemiology University of Erlangen/Nürnberg Erlangen Germany
2. Institute for Interdisciplinary Dermatologic Prevention and Rehabilitation (iDerm) Osnabrück University Osnabrück Germany
3. Department of Dermatology, Environmental Medicine and Health Theory Osnabrück University Osnabrück Germany
4. Department of Dermatology and Allergology University Hospital Munich Germany
5. Allergy Unit, Department of Dermatology University Hospital Zurich Zurich Switzerland
6. Department of Dermatology Medical University of Graz Graz Austria
7. Department of Dermatology, Venereology and Allergology and Leipzig Interdisciplinary Center of Allergology (LICA) Comprehensive Allergy Center University Leipzig Medical Faculty Leipzig Germany
8. Information Network of Departments of Dermatology University Medical Center Göttingen Germany