Analysis of chronic obstructive pulmonary disease exacerbations with the dual bronchodilator QVA149 compared with glycopyrronium and tiotropium (SPARK): a randomised, double-blind, parallel-group study

2013 ◽  
Vol 1 (3) ◽  
pp. 199-209 ◽  
Author(s):  
Jadwiga A Wedzicha ◽  
Marc Decramer ◽  
Joachim H Ficker ◽  
Dennis E Niewoehner ◽  
Thomas Sandström ◽  
...  
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