Prevention of exacerbations of bronchitis: trial of a long acting sulphonamide.
D000328:Adult; D000368:Aged; D001991:Bronchitis / Q000188:drug therapy*; D002245:Carbon Dioxide / Q000097:blood; D002908:Chronic Disease; D006801:Humans; D008875:Middle Aged; D010919:Placebos; D013147:Spirometry; D013183:Sputum; D013449:Sulfonamides / Q000627:therapeutic use*
D010919:Placebos; D013449:Sulfonamides; D002245:Carbon Dioxide