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Authors
Su, Hailing
Guo, Cuihua
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Funding
Funding for this research was provided by:
National Science Fundational of China (NO.11571209,No.61473180,No. 61503230)
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Article History
Received: 18 December 2018
Accepted: 24 April 2019
First Online: 8 May 2019
Competing interests
: The authors declare that they have no competing interests.
