[1] Imperial Coll London, Ctr Haematol, London, England
[2] Belfast City Hosp, NI Haemophilia Comprehens Care Ctr, Belfast, North Ireland
[3] Liverpool Hosp, Liverpool, England
[4] Royal Free London NHS Fdn Trust, Haemophilia Ctr, London, England
[5] Royal Free London NHS Fdn Trust, Thrombosis Unit, London, England
[6] Royal Victoria Infirm, Newcastle Upon Tyne, England
[7] Sheffield Royal Hallamshire, Sheffield, England
[8] Royal Coll Surgeons Ireland, Irish Ctr Vasc Biol, Sch Pharm & Biomol Sci, Dublin, Ireland
[9] St James Hosp, Natl Coagulat Ctr, Dublin, Ireland
[10] Imperial Coll, Hammersmith Hosp, Fac Med, Ducane Rd, London W12 0NN, England