Funding for this research was provided by:
National Natural Science Foundation of China (61601005)
Natural Science Foundation of Anhui Province (1808085MF164)
Text and Data Mining valid from 2018-10-11
Received: 11 June 2018
Accepted: 18 September 2018
First Online: 11 October 2018
: The authors declare that they have no competing interests.
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