1. Department of Clinical Epidemiology Leiden University Medical Center Leiden the Netherlands
2. Van Creveldkliniek University Medical Center UtrechtUtrecht University Utrecht the Netherlands
3. Department of Internal Medicine Division of Thrombosis and Hemostasis Leiden University Medical Center Leiden the Netherlands
4. Department of Hematology Maastricht University Medical Centre Maastricht the Netherlands
5. Department of Paediatrics University Medical Center Groningen Groningen the Netherlands
6. Department of Hematology HagaZiekenhuis The Hague the Netherlands
7. Department of Internal Medicine Maxima Medical Centre Eindhoven the Netherlands
8. Department of Vascular Medicine Amsterdam University Medical Centres Amsterdam the Netherlands
9. Department of Hematology Radboud University Medical Center Nijmegen the Netherlands
10. Hemophilia Treatment Center Nijmegen‐Eindhoven‐Maastricht Nijmegen the Netherlands
11. Department of Hematology Erasmus MC Rotterdam the Netherlands
12. Netherlands Hemophilia Patient Society (NVHP) Nijkerk the Netherlands
13. Center for Clinical Transfusion Research Sanquin‐Leiden University Medical Center Leiden the Netherlands
14. Pediatric Hematology Emma Children’s HospitalAmsterdam UMCUniversity of Amsterdam Amsterdam the Netherlands