| NCT Number | NCT00307281 |
| Lead Sponsor | University of Pittsburgh |
| Conditions | Emphysema, Chronic Obstructive Pulmonary Disease, Chronic Bronchitis |
| Enrollment | 3,000 participants |
| Start Date | 2000-08 |
| Primary Completion | 2030-07 (estimated) |
| Study Completion | 2030-07 (estimated) |
| Updated on ClinicalTrials.gov | 2025-09-25 |