AIR POLLUTION AS A CAUSE OF CHRONIC BRONCHITIS.
D000397:Air Pollution; D001699:Biometry; D001991:Bronchitis; D029481:Bronchitis, Chronic; D013223:Statistics as Topic; D014116:Toxicology; D006113:United Kingdom; D014481:United States
AIR POLLUTION; BRONCHITIS; GREAT BRITAIN; STATISTICS; TOXICOLOGIC REPORT; UNITED STATES