@article{:/content/journals/10.22233/20412495.0922.20, author = "Whitehead, Martin and Perkins, Rosemary", title = "Focus on…", journal = "BSAVA Companion", year = "2022", volume = "2022", number = "9", eid = , pages = "20-25", url = "https://www.bsavalibrary.com/content/journals/10.22233/20412495.0922.20", doi = "https://doi.org/10.22233/20412495.0922.20" }