1. Department of Occupational and Environmental DermatologySkåne University Hospital, Lund University Malmö Sweden
2. Department of Social MedicineOccupational and Environmental Dermatology, University of Heidelberg Heidelberg Germany
3. Department of Dermatology, University of GroningenUniversity Medical Centre Groningen Groningen The Netherlands
4. Department of DermatologyUniversity Hospital Jena Jena Germany
5. Clinic of DermatologyUniversity Hospital and Faculty of Medicine, University of Coimbra Coimbra Portugal
6. Department of Dermatology, Azienda Ospedaliera papa Giovanni XXIII, BergamoCentro Studi GISED—FROM Presidio Ospedaliero Matteo Rota Bergamo Italy
7. Department of DermatologySkåne University Hospital, Lund University Malmö Sweden