title: Air pollution and exacerbations of bronchitis.
mesh_terms: D000328:Adult; D000368:Aged; D000397:Air Pollution; D001991:Bronchitis / Q000150:complications*; D005260:Female; D006801:Humans; D006813:Humidity; D008131:London; D008297:Male; D008875:Middle Aged; D012621:Seasons; D013458:Sulfur Dioxide; D013696:Temperature
chemical_list: D013458:Sulfur Dioxide