1. Department of Public Health and Medicine/Rheumatology Umeå University Umeå Sweden
2. Department of Clinical Sciences/Rheumatology, Lund University, Lund, Sweden, and Department of Medicine University of Cambridge Cambridge UK
3. Department of Statistics Umeå University Umeå Sweden
4. Department of Rheumatology and Inflammation Research Gothenburg University Gothenburg Sweden
5. Science for Life Laboratory, Department of Microbiology, Tumor and Cell Biology (MTC), Karolinska Institutet, and Evi‐networks Stockholm Sweden
6. Department of Clinical Microbiology Umeå University Umeå Sweden