Bronchodilators are the cornerstone of pharmacological management of chronic obstructive pulmonary disease (COPD), and current guidelines recommend their use as first-line therapy in symptomatic ...

This was a prospective, randomized, open-label, blinded end point (PROBE), 30 parallel group study with two treatment arms. A total of 160 outpatients aged 61–75 years entered a 2-week wash-out period ...