1. Jon J van Rood Center for Clinical Transfusion ResearchLUMC/Sanquin Leiden The Netherlands
2. Department of Hematology Leiden University Medical Center Leiden The Netherlands
3. Department of Clinical Epidemiology Leiden University Medical Center Leiden The Netherlands
4. Department of Hematology University Medical Center Utrecht Utrecht The Netherlands
5. Department of Thrombosis and Hemostasis Leiden University Medical Center Leiden The Netherlands
6. Department of Hematology Haga Teaching Hospital Den Haag The Netherlands
7. Department of Hematology Maastricht University Medical Center Maastricht The Netherlands
8. Central Diagnostic Laboratory University Medical Center Utrecht Utrecht The Netherlands