1. Department of Clinical Sciences, Lund, Section for Rheumatology, Lund University and Skåne University Hospital, Lund, Sweden
2. Department of Laboratory Medicine, Section of Microbiology, Immunology and Glycobiology, Lund University, Lund, Sweden
3. Clinical Immunology and Transfusion Medicine University and Regional Laboratories, Region Skåne, Lund, Sweden