Funding for this research was provided by:
National Natural Science Foundation of China (31601602)
the Natural Science Foundation of Fujian Providence (2017J05049)
Text and Data Mining valid from 2018-04-20
Received: 27 December 2017
Accepted: 16 April 2018
First Online: 20 April 2018
: The authors declare that they have no competing interests.
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