1. UK National Haemophilia Database Manchester UK
2. University Department of Clinical Haematology Manchester Royal Infirmary Manchester UK
3. Institute of Cancer Sciences, Faculty of Biology, Medicine and Health The University of Manchester Manchester UK
4. The Royal London Hospital Haemophilia Centre, Barts and The London School of Medicine and Dentistry Queen Mary University London London UK
5. School of Medicine Cardiff University, University Hospital of Wales Cardiff UK
6. Kent Haemophilia & Thrombosis Centre East Kent Hospitals University NHS Trust Canterbury UK
7. Roche/Genentech South San Francisco California
8. School of Vascular Medicine The University of Manchester Manchester UK