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Hess AS, Shardell M, Johnson JK, Thom KA, Roghmann MC, Netzer G, Amr S, Morgan DJ, Harris AD.Hess AS, et al.Infect Control Hosp Epidemiol. 2013 May;34(5):487-93. doi: 10.1086/670205.Infect Control Hosp Epidemiol. 2013.PMID: 23571365Free PMC article.Clinical Trial.