1 Department of Van Creveldkliniek, University Medical Center Utrecht, University Utrecht, Utrecht, The Netherlands.
2 Department of Thrombosis and Hemostasis and Einthoven Laboratory for Vascular and Regenerative Medicine, Leiden University Medical Center, Leiden, The Netherlands.
3 Department of Hematology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.
4 Department of Pediatric Hematology, Amsterdam Medical Center Emma Children's Hospital, Amsterdam, The Netherlands.
5 Department of Plasma Proteins, Sanquin Research, Amsterdam, the Netherlands.
6 Department of Hematology, Radboud University Medical Center, Nijmegen, The Netherlands.
7 Department of Pediatric Hematology, Erasmus University Medical Center-Sophia Children's Hospital, Rotterdam, The Netherlands.
8 Dutch Society of Haemophilia Patients, Leiden, The Netherlands.
9 Jon J van Rood Center for Clinical Transfusion Medicine, Sanquin Research, Leiden, The Netherlands.
10 Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, The Netherlands.
11 Department of Haematology, Erasmus University Medical Center Rotterdam, Rotterdam, The Netherlands.