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Authors
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Funding
Funding for this research was provided by:
National Natural Science Foundation of China ((No.51665010))
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Article History
Received: 27 October 2018
Accepted: 27 November 2018
First Online: 10 December 2018
Compliance with ethical standards
:
: We have not any financial/commercial conflicts of interest.
Free to read: This content has been made available to all.
