1. Comparison of serum, EDTA plasma and P100 plasma for luminex-based biomarker multiplex assays in patients with chronic obstructive pulmonary disease in the SPIROMICS study O’Neal, Wanda; Anderson, Wayne; Basta, Patricia; Carretta, Elizabeth; Doerschuk, Claire; Barr, R. Graham; Bleecker, Eugene; Christenson, Stephanie; Curtis, Jeffrey; Han, Meilan; Hansel, Nadia; Kanner, Richard; Kleerup, Eric; Martinez, Fernando; Miller, Bruce; Peters, Stephen; Rennard, Stephen; Scholand, Mary; Tal-Singer, Ruth; Woodruff, Prescott; Couper, David; Davis, Sonia 2014 Articles Blood plasma--AnalysisLungs--Diseases, ObstructiveMedicine
2. The clinical features of the overlap between COPD and asthma Hardin, Megan; Silverman, Edwin; Barr, R. Graham; Hansel, Nadia; Schroeder, Joyce; Make, Barry; Crapo, James; Hersh, Craig 2011 Articles Epidemiology