1. Department of Occupational and Environmental Dermatology; Lund University, Skåne University Hospital; 205 02 Malmö Sweden
2. Department of Dermatology; Sahlgrenska University Hospital; 413 45 Gothenburg Sweden
3. Unit of Occupational and Environmental Dermatology; Institute of Environmental Medicine, Karolinska Institute and Centre for Occupational and Environmental Medicine; 113 65 Stockholm Sweden
4. Department of Dermatology; Uddevalla Hospital; 451 80 Uddevalla Sweden
5. Department of Public Health and Clinical Medicine, Dermatology & Venerology; Umeå University; 901 85 Umeå Sweden