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Authors
Li, Wenrui
Zhang, Qimin
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Funding
Funding for this research was provided by:
National Natural Science Foundation of China (11661064, 11461053)
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Article History
Received: 8 October 2018
Accepted: 15 January 2019
First Online: 24 January 2019
Competing interests
: The authors declare that they have no competing interests.
