The tetracyclines in purulent exacerbations of chronic bronchitis.
D000667:Ampicillin / Q000627:therapeutic use; D001991:Bronchitis / Q000150:complications / Q000188:drug therapy*; D002908:Chronic Disease; D006801:Humans; D010403:Penicillin Resistance; D013754:Tetracyclines / Q000009:adverse effects / Q000627:therapeutic use*
D013754:Tetracyclines; D000667:Ampicillin