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Effects of a simple prototype respiratory muscle trainer on respiratory muscle strength, quality of life and dyspnea, and oxidative stress in COPD patients: a preliminary study.
Leelarungrayub J, Pinkaew D, Puntumetakul R, Klaphajone J. Leelarungrayub J, et al. Among authors: pinkaew d. Int J Chron Obstruct Pulmon Dis. 2017 May 12;12:1415-1425. doi: 10.2147/COPD.S131062. eCollection 2017. Int J Chron Obstruct Pulmon Dis. 2017. PMID: 28553094 Free PMC article. Clinical Trial.
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