title: Trends in selected gastrointestinal infections: 1999.
mesh_terms: D004739:England / Q000453:epidemiology; D005767:Gastrointestinal Diseases / Q000453:epidemiology*; D006801:Humans; D015994:Incidence; D007239:Infections / Q000453:epidemiology*; D014852:Wales / Q000453:epidemiology