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