Faculty of Health Sciences, Research Unit of Rheumatology, Department of Clinical Research, University of Southern Denmark, Odense University Hospital, J.B. Winsløws Vej 4, Indgang 96, 1. Sal, 5000, Odense, Denmark. dmasic@health.sdu.dk. Diagnostik Center, Silkeborg Regional Hospital, Silkeborg, Denmark. dmasic@health.sdu.dk. Department of Rheumatology, Aarhus University Hospital, Aarhus, Denmark. Department of Cardiology, Aarhus University Hospital, Aarhus, Denmark. Department of Rheumatology, King Christian 10th Hospital for Rheumatic Diseases, Gråsten, Denmark. South Jutland Hospital, Institute of Regional Health Services Research, University of Southern Denmark, Odense, Denmark. COPECARE and DANBIO, Rigshospitalet, Copenhagen, Denmark. Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark. Faculty of Health Sciences, Research Unit of Rheumatology, Department of Clinical Research, University of Southern Denmark, Odense University Hospital, J.B. Winsløws Vej 4, Indgang 96, 1. Sal, 5000, Odense, Denmark. OPEN-Open Patient Data Explorative Network, Odense University Hospital, Odense, Denmark. Department of Clinical Research, University of Southern Denmark, Odense, Denmark. Musculoskeletal Statistics Unit, the Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark. Diagnostik Center, Silkeborg Regional Hospital, Silkeborg, Denmark.