A follow-up study of the grain elevator workers in the Port of Vancouver.
D000328:Adult; D000367:Age Factors; D001955:British Columbia; D002523:Edible Grain; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D011009:Pneumoconiosis / Q000453:epidemiology*; D012129:Respiratory Function Tests; D012907:Smoking; D013997:Time Factors