DOI:
10.1055/s-00000059
Pneumologie
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References
Wedzicha JA, Decramer M, Ficker JH. et al.
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.
Lancet Respir Med 2013;
1: 199-209
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