RT Journal Article SR Electronic T1 Diagnosing COPD: High Time for a Paradigm Shift JF Respiratory Care FD American Association for Respiratory Care SP 1861 OP 1863 DO 10.4187/respcare.01590 VO 56 IS 11 A1 Quanjer, Philip H A1 Ruppel, Gregg L YR 2011 UL http://rc.rcjournal.com/content/56/11/1861.abstract AB