The diagnosis of emphysema: how and why.
D001991:Bronchitis / Q000150:complications; D002245:Carbon Dioxide / Q000097:blood; D002908:Chronic Disease; D004417:Dyspnea / Q000628:therapy; D006801:Humans; D010102:Oxygen Inhalation Therapy; D011656:Pulmonary Emphysema / Q000175:diagnosis* / Q000000981:diagnostic imaging; D011859:Radiography; D012129:Respiratory Function Tests
D002245:Carbon Dioxide