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Kamal N, Rouquette-Loughlin C, Shafer WM.Kamal N, et al. Among authors: shafer wm.Infect Immun. 2007 Dec;75(12):6008-12. doi: 10.1128/IAI.01995-06. Epub 2007 Oct 8.Infect Immun. 2007.PMID: 17923520Free PMC article.