NCT00784342
- Conditions
- Chronic Disease, Chronic Obstructive Pulmonary Disease, Disease Attributes, +6 more
- Locations
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- NorthShore University HealthSystem (Formerly Evanston Northwestern Healthcare) Evanston, Illinois, United States
- University of North Carolina at Chapel Hill Chapel Hill, North Carolina, United States
- Duke University Durham, North Carolina, United States
- Pittsburgh VA Hospital Pittsburgh, Pennsylvania, United States