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Zingg W, Posfay-Barbe KM, Pfister RE, Touveneau S, Pittet D.Zingg W, et al.Infect Control Hosp Epidemiol. 2011 Jan;32(1):42-9. doi: 10.1086/657634. Epub 2010 Dec 1.Infect Control Hosp Epidemiol. 2011.PMID: 21121817