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Ena J, Boelaert JR, Boyken LD, Van Landuyt HW, Godard CA, Herwaldt LA.Ena J, et al. Among authors: herwaldt la.Infect Control Hosp Epidemiol. 1994 Feb;15(2):78-81. doi: 10.1086/646865.Infect Control Hosp Epidemiol. 1994.PMID: 8201238