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Poljak Z, Dewey CE, Martin SW, Christensen J, Carman S, Friendship RM.Poljak Z, et al.Prev Vet Med. 2007 Oct 16;81(4):236-49. doi: 10.1016/j.prevetmed.2007.04.018. Epub 2007 May 24.Prev Vet Med. 2007.PMID: 17531333