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The bronchodilator effects of extrafine glycopyrronium added to combination treatment with beclometasone dipropionate plus formoterol in COPD: A randomised crossover study (the TRIDENT study)

AsthmaAdvanced Lung DiseaseMedicinePulmonary PharmacologyPulmonary MedicineTrident StudyCrossover StudyPharmacologyExtrafine GlycopyrroniumPulmonary Disease