RT Journal Article SR Electronic T1 Waiting to Exhale: Optimizing Noninvasive Synchrony in COPD? JF Respiratory Care FD American Association for Respiratory Care SP 122 OP 124 DO 10.4187/respcare.04573 VO 61 IS 1 A1 Jordan S Rettig YR 2016 UL http://rc.rcjournal.com/content/61/1/122.abstract AB