Efficacy and Safety of Once-Daily QVA149 Compared With the Free Combination of Once-Daily Tiotropium Plus Twice-Daily Formoterol in Patients With Moderate-To-Severe COPD (QUANTIFY): A Randomised, Non-Inferiority Study

Thorax - United Kingdom
doi 10.1136/thoraxjnl-2014-206345
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BMJ


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