1. Sheffield Haemophilia and Thrombosis Centre; Sheffield Teaching Hospitals NHS Trust; Sheffield UK
2. Haemostasis section; Biotherapeutics Group; National Institute for Biological Standards and Control; Potters Bar UK
3. Haemostasis Research Unit; Department of Haematology; University College London; London UK
4. Department of Haematology; Addenbrooke's Hospital; Cambridge UK
5. Department of Cardiovascular Science; University of Sheffield; Sheffield UK