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Efficacy and safety of once-daily QVA149 compared with twice-daily salmeterol–fluticasone in patients with chronic obstructive pulmonary disease (ILLUMINATE): a randomised, double-blind, parallel group study

Twice-daily Salmeterol–fluticasonePulmonary CareAllergyAdvanced Lung DiseasePulmonary PharmacologyPulmonary MedicinePharmacotherapyOnce-daily Qva149Parallel Group StudyMedicinePulmonary Disease