Chronic bronchitis, emphysema, and bronchial spasm in bituminous coal workers; an epidemiologic study.
D001980:Bronchi; D001982:Bronchial Diseases; D001986:Bronchial Spasm; D001991:Bronchitis / Q000706:statistics & numerical data*; D029481:Bronchitis, Chronic; D003031:Coal; D004194:Disease; D004646:Emphysema; D016021:Epidemiologic Studies; D006801:Humans; D008168:Lung; D009784:Occupational Diseases; D011656:Pulmonary Emphysema / Q000706:statistics & numerical data*
D003031:Coal
BRONCHI/diseases; BRONCHITIS/statistics; EMPHYSEMA, PULMONARY/statistics; OCCUPATIONAL DISEASES