title: Antibiotics or placebo for chronic obstructive pulmonary disease.
mesh_terms: D000900:Anti-Bacterial Agents / Q000627:therapeutic use*; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000150:complications*; D010919:Placebos
chemical_list: D000900:Anti-Bacterial Agents; D010919:Placebos