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Authors
Ma, Yingxu
Bai, Fan
Qin, Fen
Li, Yixi
Tu, Tao
Sun, Chao
Zhou, Shenghua
Liu, Qiming http://orcid.org/0000-0002-5213-2668
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Article History
Received: 20 June 2018
Accepted: 3 August 2018
First Online: 13 August 2018
Ethics approval and consent to participate
: Not applicable. (Because this is a meta-analysis).
: Not applicable.
: The authors declare that they have no competing interests.
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