1. Center for treatment of Rheumatic and Musculoskeletal Diseases (REMEDY), Diakonhjemmet Hospital, Oslo, Norway
2. Faculty of Medicine, University of Oslo, Oslo, Norway
3. Clinical Laboratory, Diakonhjemmet Hospital, Oslo, Norway
4. Broegelmann Research Laboratory, Department of Clinical Science, University of Bergen, Bergen, Norway
5. Department of Paediatrics, Haukeland University Hospital, Bergen, Norway
6. Thermo Fisher Scientific, Uppsala, Sweden
7. Thermo Fisher Scientific, Freiburg, Germany
8. Department of Medicine, Karolinska Institutet, Solna, Sweden