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

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

affiliation not provided to SSRN, Copenhagen Center for Arthritis Research (COPECARE) - Center for Rheumatology and Spine Diseases, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, Karolinska Institutet - Clinical Epidemiology Division, Diakonhjemmet Hospital, Karolinska Institutet - Clinical Epidemiology Division, affiliation not provided to SSRN, Institute of Rheumatology, Institute of Rheumatology, affiliation not provided to SSRN, University of Aberdeen, Helsinki University Hospital, affiliation not provided to SSRN, University of Ljubljana - University Medical Centre Ljubljana, University of Göttingen - University Medical Centre, affiliation not provided to SSRN, Landspitali University Hospital, Diakonhjemmet Hospital, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, UOD Reumatologia- Grande Ospedale Metropolitano, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, University of Medicine and Pharmacy Carol Davila Bucharest, affiliation not provided to SSRN, affiliation not provided to SSRN, University of Copenhagen - Department of Clinical Medicine, University of Copenhagen and University of Copenhagen - Department of Clinical Medicine

affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, University of Copenhagen - Department of Clinical Medicine, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, Karolinska Institutet - Clinical Epidemiology Division, affiliation not provided to SSRN, Institute of Rheumatology, Institute of Rheumatology, University of Medicine and Pharmacy Carol Davila Bucharest, University of Copenhagen - Department of Clinical Medicine, 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, affiliation not provided to SSRN, Diakonhjemmet Hospital, District General Hospital of Førde - Section for Rheumatology, affiliation not provided to SSRN, University of Göttingen - University Medical Centre, Landspitali University Hospital, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, - Hospital General Universitario Gregorio Marañón, University of Aberdeen - Aberdeen Centre for Arthritis and Musculoskeletal Health (Epidemiology Group), affiliation not provided to SSRN and University of Copenhagen