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