1. Sheffield Haemophilia and Thrombosis Centre; Royal Hallamshire Hospital; Sheffield UK
2. Department of Infection, Immunity and Cardiovascular Disease; University of Sheffield; Sheffield UK
3. Institute of Experimental Haematology and Transfusion Medicine; University Clinic Bonn; Bonn Germany
4. van CreveldKliniek; UMC Utrecht; University Utrecht; Utrecht the Netherlands
5. Department of Vascular Medicine and Haemostasis; Haemophilia Centre; University Hospitals Leuven; Leuven Belgium
6. Centre for Bleeding Disorders; Department of Oncology; Careggi University Hospital; Florence Italy
7. Department of Pediatric Hematology; Academic Medical Centre; Amsterdam the Netherlands