1. Department of Dermatology University of Groningen, University Medical Centre Groningen Groningen The Netherlands
2. Occupational Dermatology, Department of Dermatology University Hospital Heidelberg Heidelberg Germany
3. Department of Dermatology Centro Studi GISED Bergamo Italy
4. Department of Dermatology Inselspital University Hospital Bern Switzerland
5. Department of Dermatology University Hospital Jena Jena Germany
6. Department of Dermatology, Coimbra University Hospital and Faculty of Medicine University of Coimbra Coimbra Portugal
7. Department of Dermatology AULSS8 Berica, Ospedale San Bortolo Vicenza Italy
8. Department of Dermatology Lund University, Skåne University Hospital Malmö Sweden
9. Department of Occupational and Environmental Dermatology Lund University, Skåne University Hospital Malmö Sweden