Received: 25 February 2021
Accepted: 20 July 2021
First Online: 11 August 2021
: Not applicable – retrospective records review.
: Not applicable.
: CMJ is a former employee of Pfizer Animal Health and has served as a member of the Zoetis Inc. (formerly Pfizer Animal Health) Oncology Advisory Board and occasionally received honoraria for these activities. MLM declares no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.