1. Department of Community Medicine, Malmö University Hospital, Malmö, Sweden
2. Department of Dermatology, Malmö University Hospital, Malmö, Sweden
3. Department of Dermatology, Helsingborg Hospital, Helsingborg, Sweden
4. Department of Internal Medicine, Section of Rheumatology, Karlskrona Central Hospital, Karlskrona, Sweden
5. Department of Medicine and Care and Primary Care, Linköping University, Linköping, Sweden