RT Journal Article SR Electronic T1 COPD: More options mean potentially better control JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 332 OP 334 DO 10.3949/ccjm.81b.06014 VO 81 IS 6 A1 Brian F. Mandell YR 2014 UL http://www.ccjm.org/content/81/6/332.abstract AB