Funding for this research was provided by:
National Natural Science Foundation of China (71771165, 61873108)
Key Project of Humanities and Social Sciences in Hubei Education Department (18D101)
High Level Training Project of Huanggang Normal University (201816803)
Yanta Scholars Foundation of Xi’an University of Finance and Economics (1)
Article History
First Online: 12 December 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with human or animal participants performed by any of the authors.
: Informed consent is obtained from all individual participants included in the study.