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Early intervention with tiotropium in Chinese patients with GOLD stages I–II chronic obstructive pulmonary disease (Tie-COPD): study protocol for a multicentre, double-blinded, randomised, controlled trial

By Xiaochen Li, Yumin Zhou, Shuyun Chen, Jinping Zheng, Nanshan Zhong and Pixin Ran
Publisher: BMJ
Year: 2014
DOI identifier: 10.1136/bmjopen-2013-003991
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Provided by: MUCC (Crossref)
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