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Morales CA, Guard J, Sanchez-Ingunza R, Shah DH, Harrison M.Morales CA, et al. Among authors: guard j.Appl Environ Microbiol. 2012 Sep;78(18):6405-12. doi: 10.1128/AEM.00852-12. Epub 2012 Jun 22.Appl Environ Microbiol. 2012.PMID: 22729535Free PMC article.