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Authors
Shi, Lei
Ding, Xiaohua
Chen, Zhong
Ma, Qiang
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Funding
Funding for this research was provided by:
National Natural Science Foundation of China (11501150)
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Article History
Received: 17 November 2017
Accepted: 23 February 2018
First Online: 15 March 2018
Competing interests
: The authors declare that they have no competing interests.
