RT Book, Section SR Electronic(1) A1 McBrearty, Alix YR 2020 T1 Colorectal disease T2 BSAVA Congress Proceedings 2020 PB British Small Animal Veterinary Association DO 10.22233/9781910443774.1.5 UL https://www.bsavalibrary.com/content/chapter/10.22233/9781910443774.ch1sec5