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Otterlei M, Sundan A, Skjåk-Braek G, Ryan L, Smidsrød O, Espevik T.Otterlei M, et al.Infect Immun. 1993 May;61(5):1917-25. doi: 10.1128/iai.61.5.1917-1925.1993.Infect Immun. 1993.PMID: 8478081Free PMC article.