1. Department of Clinical Epidemiology Leiden University Medical Center Leiden the Netherlands
2. Department of Vascular Medicine Amsterdam Cardiovascular SciencesAmsterdam UMCUniversity of Amsterdam Amsterdam the Netherlands
3. Department of Clinical Chemistry and Laboratory Medicine Leiden University Medical Center Leiden the Netherlands
4. Department of Reproductive Medicine & Gynecology University Medical Center Utrecht Utrecht the Netherlands
5. Department of Internal Medicine Section of Thrombosis and Hemostasis Leiden University Medical Center Leiden the Netherlands