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Pybus C, Pedraza-Reyes M, Ross CA, Martin H, Ona K, Yasbin RE, Robleto E.Pybus C, et al.J Bacteriol. 2010 Jul;192(13):3321-8. doi: 10.1128/JB.00354-10. Epub 2010 Apr 30.J Bacteriol. 2010.PMID: 20435731Free PMC article.