title: Etiology and diagnosis of pneumonia requiring ICU admission.
authors.forename: D M
authors.initials: DM
authors.lastname: Nierman
mesh_terms: D003937:Diagnosis, Differential; D006801:Humans; D007362:Intensive Care Units; D007877:Legionnaires' Disease / Q000175:diagnosis*; D010343:Patient Admission; D011014:Pneumonia / Q000175:diagnosis* / Q000382:microbiology*