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Davidson EB, Davis MS, Campbell GA, Williamson KK, Payton ME, Healey TS, Bartels KE.Davidson EB, et al.J Am Vet Med Assoc. 2001 Sep 15;219(6):776-81. doi: 10.2460/javma.2001.219.776.J Am Vet Med Assoc. 2001.PMID: 11561652Free article.Clinical Trial.
Davidson EB, Reaugh HF, Bahr RJ.Davidson EB, et al.J Am Vet Med Assoc. 2006 Jan 15;228(2):203-4. doi: 10.2460/javma.228.2.203.J Am Vet Med Assoc. 2006.PMID: 16426185Free article.No abstract available.