Maintenance salbutamol in chronic bronchitis in the elderly.
D000368:Aged; D000420:Albuterol / Q000627:therapeutic use*; D001991:Bronchitis / Q000188:drug therapy*; D002908:Chronic Disease; D005541:Forced Expiratory Volume; D006801:Humans; D014797:Vital Capacity
D000420:Albuterol