[Relapse prevention of chronic bronchitis].
D000368:Aged; D000996:Antitussive Agents / Q000008:administration & dosage*; D001991:Bronchitis / Q000517:prevention & control*; D002908:Chronic Disease; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010118:Oxytetracycline / Q000008:administration & dosage*; D012129:Respiratory Function Tests; D013147:Spirometry
D000996:Antitussive Agents; D010118:Oxytetracycline
Schubprophylaxe der chronischen Bronchitis.