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Efficacy Safety Study of Arformoterol/Tiotropium Combination Versus Either Therapy Alone in Chronic Obstructive Pulmonary Disease (COPD)
The purpose of this study is to evaluate and compare the efficacy of arformoterol twice a day and tiotropium once a day (dosed sequentially) versus tiotropium once a day alone in subjects with Chronic Obstructive Pulmonary Disease (COPD).
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