Hay C R, Baglin T P, Collins P W, Hill F G, Keeling D M
Manchester Haemophilia Comprehensive Care Centre, University Department of Haematology, Manchester Royal Infirmary, UK.
Br J Haematol. 2000 Oct;111(1):78-90. doi: 10.1046/j.1365-2141.2000.02327.x.