Karolinska Institutet, University of Helsinki - Helsinki University Hospital, University of Amsterdam - Department of Rheumatology and Clinical Immunology, University of Copenhagen - Department of Clinical Medicine, Diakonhjemmet Hospital, University of Copenhagen, University of Gothenburg - Department of Rheumatology and Inflammation Research, Diakonhjemmet Hospital, University of Amsterdam - Amsterdam Rheumatology and Immunology Centre, Landspitali University Hospital, Karolinska Institutet, University of Southern Denmark, University of Eastern Finland, University of Iceland, University of Copenhagen, Karolinska University Hospital, Sahlgrenska University Hospital, University of Eastern Finland, Lund University, Karolinska Institutet, Diakonhjemmet Hospital, Helsinki University Hospital, Silkeborg Regional Hospital - Diagnostic Centre, Lund University, Uppsala University - Uppsala University Hospital, University of Southern Denmark, University of Amsterdam - Amsterdam Rheumatology and Immunology Centre, Falun Hospital, Ålesund Hospital, University of Bergen - Haukeland University Hospital, Odense University Hospital, Örebro University Hospital, Västmanland´s Hospital, Linkoping University, Karolinska Institutet, Aalborg University, Odense University Hospital, Trondheim University Hospital, Aarhus University, University Hospital of North Norway - Department of Rheumatology, University of Oslo - Department of Research Support for Clinical Trials, Diakonhjemmet Hospital and Diakonhjemmet Hospital

Diakonhjemmet Hospital - Center for treatment of Rheumatic and Musculoskeletal Diseases (REMEDY), Karolinska Institutet - Clinical Epidemiology Division, Diakonhjemmet Hospital, Diakonhjemmet Hospital, Diakonhjemmet Hospital, Landspitali University Hospital, Diakonhjemmet Hospital, Landspitali University Hospital, Karolinska Institutet - Clinical Epidemiology Division, University of Copenhagen - Department of Clinical Medicine, Landspitali University Hospital, University of Copenhagen - Department of Clinical Medicine, Helsinki University Hospital, Ministry of Social Affairs and Health, Diakonhjemmet Hospital and Karolinska Institutet - Clinical Epidemiology Division

affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, University of Amsterdam - Department of Rheumatology and Clinical Immunology, Karolinska Institutet, Landspitali University Hospital, Diakonhjemmet Hospital, University of Helsinki - Helsinki University Hospital, University of Iceland, University of Southern Denmark, University of Eastern Finland, Karolinska Institutet, University of Copenhagen - Department of Clinical Medicine, University of Amsterdam - Amsterdam Rheumatology and Immunology Centre, University of Copenhagen, Diakonhjemmet Hospital, University of Gothenburg - Department of Rheumatology and Inflammation Research, University of Gothenburg - Department of Molecular and Clinical Medicine, University of California, San Diego (UCSD) - Department of Cellular & Molecular Medicine and affiliation not provided to SSRN