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Scott KC, Levy JK, Crawford PC.Scott KC, et al. Among authors: crawford pc.J Am Vet Med Assoc. 2002 Oct 15;221(8):1136-8. doi: 10.2460/javma.2002.221.1136.J Am Vet Med Assoc. 2002.PMID: 12387382Free article.
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Crawford PC, Slater MR, Levy JK.Crawford PC, et al.J Am Vet Med Assoc. 2005 May 1;226(9):1503-7. doi: 10.2460/javma.2005.226.1503.J Am Vet Med Assoc. 2005.PMID: 15882000Free article.Clinical Trial.
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