RT Book, Section SR Electronic(1) A1 Kook, Peter YR 2019 T1 Oesophagus T2 BSAVA Manual of Canine and Feline Gastroenterology PB British Small Animal Veterinary Association DO 10.22233/9781910443361-3e.32 UL https://www.bsavalibrary.com/content/chapter/10.22233/9781910443361-3e.chap32