Clinical Outcomes of Tiotropium Plus Fluticasone Propionate/Salmeterol Compared With Tiotropium for Chronic Obstructive Pulmonary Disease (COPD) in Korea

Clinical Outcomes of Tiotropium Plus Fluticasone Propionate/Salmeterol Compared With Tiotropium for Chronic Obstructive Pulmonary Disease (COPD) in Korea