1. Department of Dermatology, Environmental Medicine and Health Theory Osnabrück University Osnabrück Germany
2. Institute for Interdisciplinary Dermatological Prevention and Rehabilitation (iDerm) Osnabrück University Osnabrück Germany
3. National Allergy Research Centre, Department of Skin and Allergy University of Copenhagen, Gentofte Hospital Copenhagen Denmark
4. Department of Occupational Health and Environmental Medicine Institute for Medical Research and Occupational Health Zagreb Croatia
5. Department of Medical Informatics, Biometry and Epidemiology University of Erlangen Erlangen Germany
6. Amsterdam UMC, University of Amsterdam, Department of Public and Occupational Health Amsterdam Public Health Research Institute Amsterdam The Netherlands