%0 Journal Article %A Polton, Gerry %T How to… %D 2008 %J BSAVA Companion %V 2008 %N 11 %P 10-12 %R doi:https://doi.org/10.22233/20412495.1108.10 %U https://www.bsavalibrary.com/content/journals/10.22233/20412495.1108.10