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Authors
Zhang, Chunni https://orcid.org/0000-0002-6929-3652
Xie, Yu
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Funding
Funding for this research was provided by:
National Social Science Foundation of China (15CRK021)
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Article History
Received: 14 March 2018
Accepted: 19 April 2018
First Online: 26 April 2018
Competing interests
: The authors declare no conflict of interest.
