1. Department of Medical Informatics, Biometry and Epidemiology University of Erlangen/Nürnberg Erlangen Germany
2. Department of Dermatology University Hospital Jena Jena Germany
3. Occupational Dermatology, Department of Dermatology University Hospital Heidelberg Heidelberg Germany
4. Department of Occupational and Environmental Dermatology, Lund University Skåne University Hospital Malmö Sweden
5. Clinic of Dermatology, University Hospital and Faculty of Medicine University of Coimbra Coimbra Portugal
6. Department of Dermatology AULSS8 Ospedale San Bortolo di Vicenza Vicenza Italy
7. Centro Studi GISED Bergamo Italy
8. Department of Dermatology, University Medical Center Groningen University of Groningen Groningen The Netherlands
9. Department of Dermatology, Lund University Skåne University Hospital Malmö Sweden