1. University Hospital of Wales and School of Medicine, Cardiff University, United Kingdom;
2. Manchester Royal Infirmary, Manchester, United Kingdom;
3. Addenbrookes Hospital, Cambridge, United Kingdom;
4. Queen's Medical Centre, Nottingham, United Kingdom;
5. Royal Victoria Infirmary, Newcastle, United Kingdom;
6. Hallamshire Hospital, Sheffield, United Kingdom;
7. Oxford Haemophilia Centre, United Kingdom;
8. Great Ormond Hospital, London, United Kingdom;
9. Royal Free Hospital, London, United Kingdom