RT Book, Section SR Electronic(1) A1 Murrell, Jo YR 2020 T1 Analgesia: what has changed in the last 30 years? T2 BSAVA Congress Proceedings 2020 PB British Small Animal Veterinary Association DO 10.22233/9781910443774.42.6 UL https://www.bsavalibrary.com/content/chapter/10.22233/9781910443774.ch42sec6