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Authors
Yang, Zhe
Zhang, Haiqun
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Funding
Funding for this research was provided by:
National Natural Science Foundation of China (11501349)
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Article History
Received: 15 December 2017
Accepted: 21 July 2018
First Online: 25 July 2018
<!--Emphasis Type='Bold' removed-->Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
