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Holt HR, Alarcon P, Velasova M, Pfeiffer DU, Wieland B.Holt HR, et al. Among authors: pfeiffer du.BMC Vet Res. 2011 Dec 30;7:82. doi: 10.1186/1746-6148-7-82.BMC Vet Res. 2011.PMID: 22208847Free PMC article.