1. Department of Occupational and Environmental Dermatology; Lund University, Skane University Hospital; Malmö Sweden
2. Clinic of Chest Diseases, Immunology and Allergology; Vilnius University, Faculty of Medicine, Institute of Clinical Medicine; Vilnius Lithuania
3. Department of Occupational Dermatology; Sahlgrenska Academy at University of Gothenburg; Gothenburg Sweden
4. Department of Dermatology; Uddevalla Hospital; Uddevalla Sweden