Funding for this research was provided by:
Natural Science Foundation of Jiangsu Province (BK20151283)
Priority Academic Program Development of Jiangsu Higher Education Institutions (CXKT20180216)
521 Talented Project of Lianyungang (KKC17001)
Postgraduate Research & Practice Innovation Program of Jiangsu Province (SJCX18_0942)
Text and Data Mining valid from 2019-03-05
Received: 7 January 2019
Accepted: 27 February 2019
First Online: 5 March 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.