1. Department of Rheumatology, Leiden University Medical Center (LUMC), Leiden, The Netherlands
2. Division of Rheumatology, A Coruña University Hospital (CHUAC), Galicia, Spain
3. Department of Clinical Epidemiology, Leiden University Medical Center (LUMC), Leiden, The Netherlands
4. Division of Thrombosis and Hemostasis, Department of Internal Medicine, Leiden University Medical Center (LUMC), Leiden, The Netherlands
5. Department of Rheumatology, Haaglanden Medical Center, The Hague, The Netherlands