Dataset from A Randomised, Double-Blind, Placebo- and Active-Controlled, Incomplete Crossover Efficacy and Safety Comparison of 4-week Treatment Periods of Once Daily Treatment of 4 Doses of BI 1744 CL Inhalation Solution Delivered by the Respimat® in Patients With Asthma

The primary objective of this study is to determine the efficacy and safety of 4 doses of BI 1744 CL inhalation solution delivered by the Respimat® inhaler once daily for four weeks in patients with asthma in comparison to placebo.