1. Rheumatology Unit, Department of Medicine, the Karolinska Institute, Karolinska University Hospital, Stockholm, Sweden
2. Gade Laboratory for Pathology, Department of Clinical Medicine, University of Bergen, Bergen
3. Department of Oral Surgery and Oral Medicine, Institute of Clinical Odontology, University of Oslo, Oslo, Norway
4. Rheumatology and Science for Life Laboratory, Department of Medical Sciences, Uppsala University, Uppsala, Sweden
5. Global Early Development, Merck KGaA, Darmstadt, Germany
6. Department of Pathology, Haukeland University Hospital, Bergen, Norway