1. Department of Dermatology Bispebjerg Hospital, University of Copenhagen Copenhagen Denmark
2. Department of Dermatology, Environmental Medicine and Health Theory University of Osnabrück Osnabrück Germany
3. Department of Occupational Dermatology University of Lund, Skåne University Hospital Malmö Sweden
4. Department of Dermatology and Allergy Centre Odense University Hospital, University of Southern Denmark Odense Denmark
5. Department of Dermatology Hospital del Mar, IMIM, Universitat Autònoma de Barcelona Barcelona Spain
6. Department of Biomedical Science and Human Oncology, Dermatological Clinic University of Bari Bari Italy