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Palmer MV, Whipple DL, Payeur JB, Alt DP, Esch KJ, Bruning-Fann CS, Kaneene JB.Palmer MV, et al.J Am Vet Med Assoc. 2000 Jun 15;216(12):1921-4. doi: 10.2460/javma.2000.216.1921.J Am Vet Med Assoc. 2000.PMID: 10863589Free article.