%0 Journal Article %A Sturgeon, Catharine %T Ask the expert %D 2017 %J BSAVA Companion %V 2017 %N 10 %P 4-7 %R doi:https://doi.org/10.22233/20412495.1017.4 %U https://www.bsavalibrary.com/content/journals/10.22233/20412495.1017.4