[1] Oxford Univ Hosp NHS Fdn Trust, Oxford NIHR Biomed Res Ctr, Oxford, England
[2] Univ Oxford, Radcliffe Dept Med, Oxford, England
[3] Belfast City Hosp, Belfast, Antrim, North Ireland
[4] East Kent Hosp Univ Fdn NHS Trust, Kent Haemophilia & Thrombosis Ctr, Canterbury, Kent, England
[5] Sheffield Teaching Hosp NHS Fdn Trust, Royal Hallamshire Hosp, Sheffield Haemophilia & Thrombosis Ctr, Sheffield, S Yorkshire, England
[6] Hampshire Hosp NHS Fdn Trust, Haemophilia Haemostasis & Thrombosis Ctr, Basingstoke, Hants, England
[7] Univ Sheffield, Dept Infect Immun & Cardiovasc Dis, Sheffield, S Yorkshire, England