NATURAL HISTORY OF PLACEBO-TREATED PATIENTS WITH CHRONIC BRONCHIAL DISEASE OBSERVED FOR 7 YEARS.
D000900:Anti-Bacterial Agents; D000904:Antibiotics, Antitubercular; D035843:Biomedical Research; D001982:Bronchial Diseases; D001991:Bronchitis; D002908:Chronic Disease; D006801:Humans; D010919:Placebos
D000900:Anti-Bacterial Agents; D000904:Antibiotics, Antitubercular; D010919:Placebos
ANTIBIOTICS; BRONCHITIS; CLINICAL RESEARCH; PLACEBOS