RT Journal Article SR Electronic A1 Bankhead, Charles T1 Comparing Combination Therapies for COPD Maintenance JF MD Conference Express YR 2010 FD SAGE Publications VO 10 IS 3 SP 8 OP 9 DO 10.1177/155989771003006 UL http://mdc.sagepub.com/content/10/3/8.abstract AB Combination therapy with tiotropium and salmeterol led to greater improvement in lung function parameters in patients with chronic obstructive pulmonary disease than did the combination of fluticasone and salmeterol.