NEW ENGLAND JOURNAL OF MEDICINE, cilt.374, sa.23, ss.2222-2234, 2016 (SCI-Expanded)
BACKGROUND Most guidelines recommend either a long-acting beta-agonist (LABA) plus an inhaled glucocorticoid or a long-acting muscarinic antagonist (LAMA) as the first-choice treatment for patients with chronic obstructive pulmonary disease (COPD) who have a high risk of exacerbations. The role of treatment with a LABA-LAMA regimen in these patients is unclear.