Evaluation of the effectiveness and adverse events of oxycodone as a pain-relieving agent in 103 dogs with tumors: a retrospective study. - Ko, Byung-Gee; Kim, Tae-Hyun; Namkung, Hyun; Lee, Hye-Gyu; Kang, Young-Jun; Youn, Ga-Hee; Seo, Kyoung-Won; Youn, Hwa-Young; Ryu, Min-Ok (BMC Veterinary Research, 2025)