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O'Donnell DE, Casaburi R, Frith P, Kirsten A, De Sousa D, Hamilton A, Xue W, Maltais F.O'Donnell DE, et al. Among authors: xue w.Eur Respir J. 2017 Apr 19;49(4):1601348. doi: 10.1183/13993003.01348-2016. Print 2017 Apr.Eur Respir J. 2017.PMID: 28424359Free PMC article.Clinical Trial.