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Authors
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Funding
Funding for this research was provided by:
National Natural Science Foundation of China (81470729, 81500829, 81470729, 81500829, 81500829, 81470729, 81470729, 81500829)
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Article History
Received: 9 April 2018
Accepted: 25 June 2018
First Online: 13 July 2018
Competing Interests
: The authors declare no competing interests.
