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Katz JB, Evans LE, Hutto DL, Schroeder-Tucker LC, Carew AM, Donahue JM, Hirsh DC.Katz JB, et al.J Am Vet Med Assoc. 2000 Jun 15;216(12):1945-8. doi: 10.2460/javma.2000.216.1945.J Am Vet Med Assoc. 2000.PMID: 10863594Free article.