Pulmonary Disease, Chronic Obstructive — A 24-week Study to Compare Umeclidinium/Vilanterol (UMEC/VI), UMEC and Salmeterol in Subjects With Chronic Obstructive Pulmonary Disease (COPD)
Citation(s)
A 24-week Treatment, Multi-center, Randomized, Double-blind, Double-dummy, Parallel Group Study to Compare Umeclidinium/Vilanterol, Umeclidinium, and Salmeterol in Subjects With Chronic Obstructive Pulmonary Disease (COPD)