1. Department of Pediatric Hematology; Emma Children's Hospital; Academic Medical Center; Amsterdam the Netherlands
2. Department of Hematology; van Creveldkliniek; University Medical Center Utrecht; Utrecht the Netherlands
3. Institute of Experimental Haematology and Transfusion Medicine; University Clinic Bonn; Bonn Germany
4. Department of Cellular Biotechnology and Hematology; Sapienza University of Rome; Rome Italy
5. Regional Reference Centre for Inherited Bleeding Disorders; University Hospital; Parma Italy
6. Institute for Thrombophilia and Haemostaseology; Raphaelsklinik; Munster Germany
7. Clinical Division of Haematology and Haemostaseology; Department of Medicine I; Medical University of Vienna; Vienna Austria
8. Center for Clinical Transfusion Research; Sanquin Research; Leiden the Netherlands
9. Jon J. van Rood Center for Clinical Transfusion Research; Leiden University Medical Center; Leiden the Netherlands
10. Department of Clinical Epidemiology; Leiden University Medical Center; Leiden the Netherlands