Affiliation: | 1. Department of Haematology, Aberdeen Royal Infirmary, , Aberdeen;2. Haemophilia Centre, Queen Elizabeth Hospital, , Birmingham;3. Haemophilia Centre, Queens Medical Centre, , Nottingham;4. Centre for Haematology, Imperial College London;5. Haemophilia Centre and Haemostasis Unit, Royal Free Hospital, , London;6. Haemophilia and Thrombosis Centre, Royal Hallamshire Hospital, , Sheffield, UK |