1. Manchester University Department of Haematology Manchester Royal Infirmary Manchester UK
2. The UK National Haemophilia Database Manchester UK
3. The Department of Haematology Royal Hospital for Sick Children Glasgow UK
4. The Department of Haematology Barts and The London School of Medicine and Dentistry, QMUL London UK
5. The Haemophilia Centre Great Ormond Street Hospital London UK
6. The Haemophilia Centre Guys and St Thomas's Hospital London UK
7. The Department of Haematology Newcastle upon Tyne Hospitals NHS Trust Newcastle upon Tyne UK
8. The Department of Haematology Birmingham Children's Hospital Birmingham UK
9. The University Department of Haematology The University Hospital of Wales School of Medicine Cardiff University Cardiff UK