Funding for this research was provided by:
National Natural Science Foundation of China (31600904)
Natural Science Foundation of Hubei University (170016)
Humanities and Social Science Research Project of Hubei Provincial Education Department (18Q017)
Article History
Received: 30 October 2017
Accepted: 16 June 2018
First Online: 12 July 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in this study were in accordance with the ethical standards of the institutional and national research committee and with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.
: Written informed consent was obtained from all participants.