1. Division of Hemostasis and Thrombosis, Department of Hematology, and
2. Department of Clinical Epidemiology, University Medical Center Groningen, Groningen, The Netherlands;
3. Department of Vascular Medicine, Academic Medical Center Amsterdam, Amsterdam, The Netherlands;
4. Departments of Hematology and Clinical Epidemiology, University Hospital Maastricht, Maastricht, The Netherlands; and
5. Medical Technology Assessment, University Hospital Maastricht, Maastricht, The Netherlands