title: Antibiotics for exacerbations of chronic bronchitis.
mesh_terms: D000368:Aged; D000900:Anti-Bacterial Agents / Q000627:therapeutic use*; D001991:Bronchitis / Q000150:complications*; D002433:Cefaclor / Q000627:therapeutic use; D002908:Chronic Disease; D002986:Clinical Trials as Topic; D004311:Double-Blind Method; D006801:Humans; D008875:Middle Aged; D011897:Random Allocation; D012141:Respiratory Tract Infections / Q000517:prevention & control
chemical_list: D000900:Anti-Bacterial Agents; D002433:Cefaclor