[Prevention of relapses in chronic bronchitis patients. Experimentation in a workers' community].
D000328:Adult; D001991:Bronchitis / Q000188:drug therapy*; D002908:Chronic Disease; D006801:Humans; D008690:Methacycline / Q000627:therapeutic use*; D008875:Middle Aged; D009784:Occupational Diseases
D008690:Methacycline
Profilassi delle ricadute nei bronchitici cronici. Esperimento in una comunità operaia.