[A ten-year follow-up of chronic emphysema and cor pulmonale in the Shushan Commune in Hefei].
D000367:Age Factors; D000368:Aged; D002681:China; D002908:Chronic Disease; D005500:Follow-Up Studies; D006801:Humans; D008875:Middle Aged; D011656:Pulmonary Emphysema / Q000401:mortality*; D011660:Pulmonary Heart Disease / Q000401:mortality*; D013997:Time Factors