title: Pneumocystis carinii: a versatile opportunist.
authors.forename: L L
authors.initials: LL
authors.lastname: Pifer
mesh_terms: D006801:Humans; D009894:Opportunistic Infections / Q000382:microbiology*; D011010:Pneumocystis / Q000502:physiology; D011020:Pneumonia, Pneumocystis / Q000382:microbiology*