title: [Protracted pneumonia and its etiology].
mesh_terms: D000328:Adult; D000368:Aged; D001424:Bacterial Infections / Q000209:etiology*; D002908:Chronic Disease; D006193:Haemophilus influenzae / Q000472:pathogenicity; D006801:Humans; D007711:Klebsiella pneumoniae / Q000472:pathogenicity; D008875:Middle Aged; D011014:Pneumonia / Q000209:etiology*; D013183:Sputum / Q000382:microbiology; D013211:Staphylococcus aureus / Q000472:pathogenicity; D013291:Streptococcus / Q000472:pathogenicity; D013997:Time Factors
vernacular_title: Zatiazhnye pnevmonii i ikh etiologiia.