This study was performed at the Matthew J. Ryan Veterinary Hospital, School of Veterinary Medicine, University of Pennsylvania.
Financial support was provided by multiple donations to the PennVet Shelter Canine Mammary Tumor Program. This work was made possible through this program.
The authors declare that there were no conflicts of interest.
STATA/MP, version 15, StataCorp, College Station, Tex.
Receiver operating characteristic curve
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