RT Journal Article SR Electronic T1 Serum Biomarkers of COPD JF Respiratory Care FD American Association for Respiratory Care SP 395 OP 395 DO 10.4187/respcare.04592 VO 61 IS 3 A1 Baishakhi Ghosh YR 2016 UL http://rc.rcjournal.com/content/61/3/395.1.abstract AB