1. St George's Healthcare NHS Trust Haemophilia Centre; St George's Hospital; London; UK
2. Department of Orthopaedic Surgery; Royal Free Hospital NHS Foundation Trust; London; UK
3. Haemostasis Division; Hôpital Edouard Herriot; Lyon; France
4. Kent Haemophilia Centre; Kent & Canterbury Hospital; Canterbury; Kent; UK
5. The Katharine Dormandy Haemophilia Centre and Thrombosis Unit; Royal Free Hospital NHS Foundation Trust; London; UK