title: Trimethoprim/sulphamethoxazole and tetracycline in lower respiratory tract infections.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002986:Clinical Trials as Topic; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012141:Respiratory Tract Infections / Q000188:drug therapy*; D013420:Sulfamethoxazole / Q000627:therapeutic use*; D013752:Tetracycline / Q000627:therapeutic use*; D014295:Trimethoprim / Q000627:therapeutic use*
chemical_list: D014295:Trimethoprim; D013752:Tetracycline; D013420:Sulfamethoxazole