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Glycopyrronium once-daily significantly improves lung function and health status when combined with salmeterol/fluticasone in patients with COPD: the GLISTEN study, a randomised controlled trial.
Frith PA, Thompson PJ, Ratnavadivel R, Chang CL, Bremner P, Day P, Frenzel C, Kurstjens N; Glisten Study Group. Frith PA, et al. Thorax. 2015 Jun;70(6):519-27. doi: 10.1136/thoraxjnl-2014-206670. Epub 2015 Apr 3. Thorax. 2015. PMID: 25841237 Free PMC article. Clinical Trial.