Variability in objective and subjective measures affects baseline values in studies of patients with COPD. by Wayne H Anderson, Jae Wook Ha, David J Couper, Wanda K O'Neal, R Graham Barr, Eugene R Bleecker, Elizabeth E Carretta, Christopher B Cooper, Claire M Doerschuk, M Bradley Drummond, MeiLan K Han, Nadia N Hansel, Victor Kim, Eric C Kleerup, Fernando J Martinez, Stephen I Rennard, Donald Tashkin, Prescott G Woodruff, Robert Paine, Jeffrey L Curtis, Richard E Kanner, SPIROMICS Research Group

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Heterogeneous burden of lung disease in smokers with borderline airflow obstruction by Cheryl S. Pirozzi, Tian Gu, Pedro M. Quibrera, Elizabeth E. Carretta, MeiLan K. Han, Susan Murray, Christopher B. Cooper, Donald P. Tashkin, Eric C. Kleerup, Igor Barjaktarevic, Eric A. Hoffman, Carlos H. Martinez, Stephanie A. Christenson, Nadia N. Hansel, R. Graham Barr, Eugene R. Bleecker, Victor E. Ortega, Fernando J. Martinez, Richard E. Kanner, Robert Paine, for the NHLBI SubPopulations and InteRmediate Outcome Measures In COPD Study (SPIROMICS)

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