Observational studyInternational journal of chronic obstructive pulmonary disease2019

Real-world effectiveness of umeclidinium/vilanterol versus fluticasone propionate/salmeterol as initial maintenance therapy for chronic obstructive pulmonary disease (COPD): a retrospective cohort study.

Chad Moretz et al.PubMed ↗Full text ↗Publisher ↗

No numbers read from the abstract.