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Dunn BE, Perez-Perez GI, Blaser MJ.Dunn BE, et al.Infect Immun. 1989 Jun;57(6):1825-33. doi: 10.1128/iai.57.6.1825-1833.1989.Infect Immun. 1989.PMID: 2722241Free PMC article.