1. Van Creveldkliniek University Medical Center Utrecht, University Utrecht Utrecht the Netherlands
2. Institute of Nursing Studies Utrecht University of applied sciences Utrecht the Netherlands
3. Department of Paediatric Haematology Emma Children's Hospital Amsterdam UMC University of Amsterdam Amsterdam the Netherlands
4. Department of Internal Medicine Division of Thrombosis and Hemostasis Leiden University Medical Center Leiden the Netherlands
5. Department of Haematology Radboud University Medical Center Nijmegen the Netherlands
6. Hemophilia Treatment Center Nijmegen Eindhoven the Netherlands
7. Department of Haematology Erasmus MC University Medical Center Rotterdam the Netherlands