1. Hematology; Erasmus University Medical Center; Rotterdam the Netherlands
2. Internal Medicine, Division; Thrombosis and Hemostasis; Leiden University Medical Center; Leiden the Netherlands
3. Einthoven Laboratory for Vascular and Regenerative Medicine; Leiden University Medical Center; Leiden the Netherlands
4. Clinical Epidemiology; Leiden University Medical Center; Leiden the Netherlands
5. Sanquin Research; Jon J van Rood Center for Clinical Transfusion Medicine; Leiden the Netherlands
6. Hematology; University of Groningen; University Medical Center Groningen; Groningen the Netherlands
7. Netherlands Hemophilia Society; Nijkerk the Netherlands
8. Pediatric Hematology; Emma Children's Hospital; Academic Medical Center; Amsterdam the Netherlands
9. Department of Plasma Proteins; Sanquin Research; Amsterdam the Netherlands
10. Pediatric Hematology; Erasmus University Medical Center - Sophia Children's Hospital; Rotterdam the Netherlands
11. Hematology; Radboud University Medical Center; Nijmegen the Netherlands
12. University Medical Center Utrecht; van Creveld Kliniek, University Utrecht; Utrecht the Netherlands