title: Pneumocystis carinii--new clinical spectrum?
authors.forename: P D
authors.initials: PD
authors.lastname: Walzer
mesh_terms: D000368:Aged; D016000:Cluster Analysis; D006801:Humans; D011010:Pneumocystis / Q000472:pathogenicity; D011020:Pneumonia, Pneumocystis / Q000453:epidemiology / Q000382:microbiology; D014774:Virulence