bibliographicCitation |
Brusasco V, Hodder R, Miravitlles M, Korducki L, Towse L, Kesten S. Health outcomes following treatment for 6 months with once daily tiotropium compared with twice daily salmeterol in patients with COPD. Thorax. 2006 Jan;61(1):91. PMID: 16396956; PMCID: PMC2080705. |