%0 Journal Article %A Humm, Karen %T How to… %D 2009 %J BSAVA Companion %V 2009 %N 9 %P 12-15 %R doi:https://doi.org/10.22233/20412495.0909.12 %U https://www.bsavalibrary.com/content/journals/10.22233/20412495.0909.12