Editorial: Natural history of chronic bronchitis.
D001991:Bronchitis / Q000150:complications* / Q000188:drug therapy; D002908:Chronic Disease; D005260:Female; D005541:Forced Expiratory Volume; D006801:Humans; D008297:Male; D011379:Prognosis; D012907:Smoking; D013752:Tetracycline / Q000627:therapeutic use; D006113:United Kingdom
D013752:Tetracycline