[1] St Georges Univ London, London, England
[2] Kingston Univ, London, England
[3] Royal Free Hosp, Katharine Dormandy Haemophilia & Thrombosis Ctr, London, England
[4] East Kent Hosp Univ NHS Fdn Trust, Canterbury, Kent, England
[5] Great Ormond St Hosp Sick Children, Illness & Disabil Orchid Res Unit, Ctr Outcomes & Experience Res Child Hlth, London, England
[6] Haemnet, London, England