Wang, Junjun http://orcid.org/0000-0002-4669-8657
Guo, Lijuan
Funding for this research was provided by:
National Natural Science Foundation of China (11671369)
the Doctoral Starting Foundation of Pingdingshan University (PXY-BSQD-2019001)
the University Cultivation Foundation of Pingdingshan (PXY-PYJJ-2019006)
Article History
Received: 29 October 2018
Accepted: 26 February 2019
First Online: 4 March 2019
Competing interests
: The authors declare that they have no competing interests.