Letter: Upper and lower respiratory infections in children.
D000900:Anti-Bacterial Agents / Q000627:therapeutic use*; D001424:Bacterial Infections / Q000188:drug therapy; D002648:Child; D002675:Child, Preschool; D006801:Humans; D012141:Respiratory Tract Infections / Q000188:drug therapy* / Q000209:etiology; D014777:Virus Diseases / Q000188:drug therapy
D000900:Anti-Bacterial Agents