RT Book, Section SR Electronic(1) A1 Taeymans, Olivier YR 2011 T1 Thyroid and parathyroid glands T2 BSAVA Manual of Canine and Feline Ultrasonography PB British Small Animal Veterinary Association DO 10.22233/9781910443118.19 UL https://www.bsavalibrary.com/content/chapter/10.22233/9781910443118.chap19