1. Department of Internal Medicine, Slotervaart Hospital, Amsterdam, The Netherlands.
2. Department of Hematology, Johannesburg General Hospital, Johannesburg, South Africa.
3. Department of Experimental Vascular Medicine, Academic Medical Center, Amsterdam, The Netherlands.
4. Department of Vascular Medicine, Academic Medical Center, Amsterdam, The Netherlands.
5. Department of Internal Medicine, Laboratory for Clinical Thrombosis and Hemostasis, University Hospital Maastricht and Cardiovascular Research Institute, Maastricht, The Netherlands.
6. Department of Virology, Erasmus Medical Center, Rotterdam, The Netherlands.