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Hamnes IS, Gjerde BK, Forberg T, Robertson LJ.Hamnes IS, et al. Among authors: robertson lj.Vet Parasitol. 2007 Feb 28;143(3-4):347-53. doi: 10.1016/j.vetpar.2006.08.032. Epub 2006 Oct 11.Vet Parasitol. 2007.PMID: 17045400
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