The Effect of Defining Chronic Obstructive Pulmonary Disease by the Lower Limit of Normal of FEV1/FVC Ratio in Tiotropium Safety and Performance in Respimat Participants

2018 ◽  
Vol 15 (2) ◽  
pp. 200-208 ◽  
Author(s):  
Peter M. A. Calverley ◽  
Achim Mueller ◽  
Andrew Fowler ◽  
Norbert Metzdorf ◽  
Robert A. Wise
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