1. Department of Thrombosis and Hemostasis Leiden University Medical Center Leiden the Netherlands
2. Einthoven Laboratory for Experimental Vascular Medicine Leiden University Medical Center Leiden the Netherlands
3. Department of Hematology Erasmus University Medical Center Rotterdam the Netherlands
4. Star‐Medical Diagnostic Center Rotterdam the Netherlands
5. Department of Clinical Epidemiology Leiden University Medical Center Leiden the Netherlands
6. Anticoagulation Clinic Utrecht Utrecht the Netherlands
7. Anticoagulation Clinic The Hague The Hague the Netherlands