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Marschall J, Hopkins-Broyles D, Jones M, Fraser VJ, Warren DK.Marschall J, et al.Infect Control Hosp Epidemiol. 2007 Nov;28(11):1299-304. doi: 10.1086/520744. Epub 2007 Aug 27.Infect Control Hosp Epidemiol. 2007.PMID: 17926282Free article.