National prevalence survey of hospital acquired infections: definitions. A preliminary report of the Steering Group of the Second National Prevalence Survey.
D003428:Cross Infection / Q000175:diagnosis / Q000453:epidemiology*; D004739:England / Q000453:epidemiology; D006306:Health Surveys; D006761:Hospitals / Q000706:statistics & numerical data*; D006801:Humans; D015995:Prevalence; D009626:Terminology as Topic