title: Nosocomial pneumonia.
authors.forename: A
authors.initials: A
authors.lastname: Ortqvist
authors.forename: A
authors.initials: A
authors.lastname: Nilsson
mesh_terms: D003428:Cross Infection / Q000175:diagnosis / Q000209:etiology*; D006801:Humans; D011014:Pneumonia / Q000175:diagnosis / Q000209:etiology*; D012537:Scandinavian and Nordic Countries