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Authors
Sun, Yuanjie
Liu, Yan
Liu, Sixing
Wang, Weiming
Liu, Zhishun
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Funding
Funding for this research was provided by:
the program of “the 13th Five-year” National Key R&D Project of the People’s Republic of China (2017YFC1703602, 2017YFC1703506)
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Article History
Received: 29 April 2019
Accepted: 27 May 2019
First Online: 3 June 2019
Compliance with ethical standards
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: The authors declare that they have no conflict of interest.
: This article does not contain any studies with animals performed by any of the authors.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional review board of the ten sites and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.
