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Pienaar NJ, Thompson PN.Pienaar NJ, et al. Among authors: thompson pn.Onderstepoort J Vet Res. 2013 Mar 5;80(1):384. doi: 10.4102/ojvr.v80i1.384.Onderstepoort J Vet Res. 2013.PMID: 23718815Review.