%0 Letter %T Guidelines on the use of prophylactic factor replacement for children and adults with Haemophilia A and B. %A Rayment R %A Chalmers E %A Forsyth K %A Gooding R %A Kelly AM %A Shapiro S %A Talks K %A Tunstall O %A Biss T %A %J Br J Haematol %V 190 %N 5 %D 09 2020 %M 32390158 %F 8.615 %R 10.1111/bjh.16704 %X