1. Department of Haematology; Erasmus University Medical Centre; Rotterdam The Netherlands
2. Department of Thrombosis and Haemostasis; Leiden University Medical Centre; Leiden The Netherlands
3. Department of Paediatric Haematology; Academic Medical Centre; Amsterdam The Netherlands
4. Department of Clinical Epidemiology; Leiden University Medical Centre; Leiden The Netherlands
5. Department of Obstetrics and Gynaecology; Erasmus University Medical Centre; Rotterdam The Netherlands
6. Einthoven Laboratory for Experimental Vascular Medicine; Leiden University Medical Centre; Leiden The Netherlands