title: THE URBAN FACTOR IN CHRONIC BRONCHITIS.
mesh_terms: D000397:Air Pollution; D001991:Bronchitis; D029481:Bronchitis, Chronic; D004739:England; D004782:Environmental Health; D005831:Genital Diseases, Female; D006306:Health Surveys; D006801:Humans; D008875:Middle Aged; D009017:Morbidity; D012129:Respiratory Function Tests; D012907:Smoking; D013183:Sputum
keywords: AIR POLLUTION; BRONCHITIS; ENGLAND; ENVIRONMENTAL HEALTH; GYNECOLOGIC DISEASES; HEALTH SURVEYS; MIDDLE AGE; MORBIDITY; RESPIRATORY FUNCTION TESTS; SMOKING; SPUTUM