title: Source of infection in nosocomial pneumonia.
authors.forename: J M
authors.initials: JM
authors.lastname: Hammond
authors.forename: P D
authors.initials: PD
authors.lastname: Potgieter
mesh_terms: D001424:Bacterial Infections / Q000209:etiology*; D003428:Cross Infection / Q000209:etiology*; D006801:Humans; D011014:Pneumonia / Q000209:etiology*