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Subpopulations and intermediate outcome measures in COPD study
Variability in objective and subjective measures affects baseline values in studies of patients with COPD.
-- PLoS One
Alveolar eosinophilia in current smokers with chronic obstructive pulmonary disease in the SPIROMICS cohort
-- J Allergy Clin Immunol
Electronic Cigarette Use in US Adults at Risk for or with COPD: Analysis from Two Observational Cohorts.
-- J Gen Intern Med