1. Division of Haematology/Oncology, Department of Paediatrics and Child Health Evaluative Sciences, Research Institute, The Hospital for Sick Children University of Toronto Toronto Ontario Canada
2. Haemophilia Centre Rhine Main Möerfelden‐Walldorf Germany
3. Maggiore Hospital Policlinico Angelo Bianchi Bonomi Hemophilia and Thrombosis Center Milan Italy
4. Institute of Experimental Haematology and Transfusion Medicine University of Bonn Bonn Germany
5. Haemophilia Centre, Great Ormond Street Hospital for Children NHS Trust Haemophilia Centre London UK
6. Our Lady's Children's Hospital Crumlin Dublin Ireland
7. Department of Haematology and Transfusion Medicine and National Haemophilia Centre University Hospital, Comenius University Bratislava Slovakia
8. Unit for Congenital Bleeding Disorders Hospital Universitario y Politécnico La Fe Valencia Spain
9. Children's Hospital Los Angeles University of Southern California Keck School of Medicine Los Angeles California