1. Department of Clinical Pharmacy and Toxicology, Leiden University Medical Center, Leiden, The Netherlands
2. Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, The Netherlands
3. Department of Hematology, Erasmus University Medical Center, Rotterdam, The Netherlands
4. Star-shl Thrombosis Service, Rotterdam, The Netherlands
5. Department of Thrombosis and Hemostasis, Leiden University Medical Center, Leiden, The Netherlands