Pneumoconiosis among anthracite coal miners in Pennsylvania.
D000328:Adult; D000367:Age Factors; D003032:Coal Mining; D004781:Environmental Exposure; D006801:Humans; D008297:Male; D008875:Middle Aged; D010414:Pennsylvania; D011009:Pneumoconiosis / Q000175:diagnosis / Q000453:epidemiology* / Q000517:prevention & control; D012494:Sampling Studies; D012907:Smoking; D013147:Spirometry