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Subpopulations and intermediate outcome measures in COPD study
Electronic Cigarette Use in US Adults at Risk for or with COPD: Analysis from Two Observational Cohorts.
-- J Gen Intern Med
Frequency of exacerbations in patients with chronic obstructive pulmonary disease: an analysis of the SPIROMICS cohort.
-- Lancet Respir Med
Comparison of low- and ultralow-dose computed tomography protocols for quantitative lung and airway assessment.
-- Med Phys