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Torres SM, Koch SN.Torres SM, et al. Among authors: koch sn.Vet Clin North Am Equine Pract. 2013 Dec;29(3):643-55. doi: 10.1016/j.cveq.2013.08.003. Epub 2013 Oct 1.Vet Clin North Am Equine Pract. 2013.PMID: 24267681Review.