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Knowles EJ, Moreton-Clack MC, Shaw S, Harris PA, Elliott J, Menzies-Gow NJ.Knowles EJ, et al.Equine Vet J. 2018 Sep;50(5):672-677. doi: 10.1111/evj.12797. Epub 2018 Feb 6.Equine Vet J. 2018.PMID: 29247453Free article.