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Authors
Qin, Peige
Feng, Meiqiang
Li, Ping
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Funding
Funding for this research was provided by:
Beijing Natural Science Foundation of China (1163007)
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Article History
Received: 11 July 2018
Accepted: 8 November 2018
First Online: 16 November 2018
Ethics approval and consent to participate
: Not applicable.
: The authors declare that there is no conflict of interests regarding the publication of this manuscript. The authors declare that they have no competing interests.
: Not applicable.
