1. Department of Dermatology and Venereology; Skaraborg Hospital; Skövde Sweden
2. Department of Dermatology and Venereology; Sahlgrenska University Hospital; Institute of Clinical Sciences at the Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
3. Department of Dermatology; Helsingborg Hospital; Clinical Sciences; Lund University; Lund Sweden
4. Department of Public Health and Clinical Medicine; Dermatology and Venereology; Umeå University; Umeå Sweden
5. Division of Dermatology; Department of Clinical and Experimental Medicine; Faculty of Health Sciences; University of Linköping; Linköping Sweden