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| 1 | Conditions listed in this trial | ||||
| Emphysema | |||||
| Lung Diseases | |||||
| Lung Diseases, Obstructive | |||||
| 2 | Additional conditions recognized in this trial | ||||
| Pulmonary Disease, Chronic Obstructive | |||||
| Pulmonary Emphysema | |||||
| 3 | More general conditions related to this trial | ||||
| Pathologic Processes | |||||
| Respiratory Tract Diseases | |||||
| 4 | Interventions listed in this trial | ||||
| Lung volume reduction surgery | |||||
| 5 | Sponsors listed in this trial | ||||
| National Heart, Lung, and Blood Institute (NHLBI) | |||||