Controlled trials of a sulphonamide given weekly to prevent exacerbations of chronic bronchitis.
D000328:Adult; D000368:Aged; D001991:Bronchitis / Q000188:drug therapy*; D002908:Chronic Disease; D002986:Clinical Trials as Topic; D006801:Humans; D008875:Middle Aged; D013183:Sputum / Q000382:microbiology; D013449:Sulfonamides / Q000008:administration & dosage*; D013492:Suppuration / Q000517:prevention & control*
D013449:Sulfonamides