Funding for this research was provided by:
the National Natural Science Foundation of China (61702381)
the State Key Program of National Natural Science of China (61332014)
the Hubei Natural Science Foundation (2017CFB196)
the Scientific Research Foundation of Wuhan University of Science and Technology (2017xz015)
the National Natural Science Foundation of China (61772124)
the Fundamental Research Funds for the Central Universities (150402002)
the National Natural Science Foundation of China (61402494)
the Guangxi Natural Science Foundation (2015GXNSFBA139243)
the Key Projects of Higher Education Undergraduate Teaching Reform Project in Guangxi (2017JGZ103)
the Scientific Research Foundation of GuangXi University (XGZ141182)
Article History
Received: 2 November 2017
Accepted: 20 September 2018
First Online: 2 October 2018
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.
: Informed consent was obtained from all individual participants included in the study.