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Ryan U, O'Hara A, Xiao L.Ryan U, et al.Appl Environ Microbiol. 2004 Jun;70(6):3761-5. doi: 10.1128/AEM.70.6.3761-3765.2004.Appl Environ Microbiol. 2004.PMID: 15184187Free PMC article.
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Jefferies R, Ryan UM, Jardine J, Broughton DK, Robertson ID, Irwin PJ.Jefferies R, et al. Among authors: ryan um.Aust Vet J. 2007 Nov;85(11):459-63. doi: 10.1111/j.1751-0813.2007.00220.x.Aust Vet J. 2007.PMID: 17970851