1. Department of Hematology; Erasmus University Medical Center; Rotterdam the Netherlands
2. Department of Thrombosis and Hemostasis; Leiden University Medical Center; Leiden the Netherlands
3. Einthoven Laboratory for Experimental Vascular Medicine; Leiden University Medical Center; Leiden the Netherlands
4. Department of Clinical Epidemiology; Leiden University Medical Center; Leiden the Netherlands
5. Jon J van Rood Center for Clinical Transfusion Medicine; Sanquin Research; Leiden the Netherlands
6. Department of Pediatric Hematology and Oncology; Erasmus University Medical Center/Sophia Children's Hospital; Rotterdam the Netherlands
7. Netherlands Hemophilia Society; Badhoevedorp the Netherlands
8. Department of Pediatric Hematology; Emma Children's Hospital; Academic Medical Center; Amsterdam the Netherlands
9. Department of Vascular Medicine; University Medical Center Groningen; Groningen the Netherlands
10. Department of Hematology; Radboud University Nijmegen Medical Centre; Nijmegen the Netherlands
11. Department of Hematology; University Medical Center Groningen; Groningen the Netherlands
12. van Creveldkliniek/Department of Hematology; University Medical Center Utrecht; Utrecht the Netherlands