Prognosis in severe chronic obstructive pulmonary disease.
D000328:Adult; D000367:Age Factors; D000368:Aged; D002908:Chronic Disease; D004562:Electrocardiography; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000401:mortality*; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D011660:Pulmonary Heart Disease / Q000401:mortality; D013147:Spirometry; D013997:Time Factors; D014397:Tuberculosis, Pulmonary / Q000401:mortality