1. Department of Clinical Sciences Malmö, Rheumatology; Lund University, Malmö, Skåne University Hospital; Lund Sweden
2. Department of Clinical Sciences Lund, Rheumatology; Lund University, Skane University Hospital; Lund Sweden
3. University of Ferrara; Ferrara Italy
4. Department of Clinical Sciences Lund, Paediatrics; Lund University, Skåne University Hospital; Lund Sweden