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Helmy YA, Krücken J, Nöckler K, von Samson-Himmelstjerna G, Zessin KH.Helmy YA, et al.Vet Parasitol. 2013 Mar 31;193(1-3):15-24. doi: 10.1016/j.vetpar.2012.12.015. Epub 2012 Dec 20.Vet Parasitol. 2013.PMID: 23305974