Funding for this research was provided by:
National Natural Science Foundation of China (61702056, 61602062)
Natural Science Foundation of Jiangsu Province (BK20160410)
Educational Commission of JiangSu Province (17KJB520001)
Text and Data Mining valid from 2019-06-11
Received: 24 October 2018
Accepted: 3 April 2019
First Online: 11 June 2019
: The authors declare that they have no competing interests.
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