| Literature DB >> 22312614 |
Abstract
Tiotropium outperformed salmeterol in reducing the frequency of exacerbations in patients with moderate-to-severe COPD.Entities:
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Year: 2012 PMID: 22312614 PMCID: PMC3273926
Source DB: PubMed Journal: J Fam Pract ISSN: 0094-3509 Impact factor: 0.493