Funding for this research was provided by:
Science and Technology Innovation Team Project of Liupanshui Normal University (LPSSYKJTD201602)
key disciplines of guizhou province of China (ZDXK (2014)24)
Liupanshui Key Laboratory for research and utilization (52020-2017-02-03)
Research Foundation for Advanced Talents of Liupanshui Normal University (LPSSYKYJJ201601)
Article History
Accepted: 29 August 2018
First Online: 20 September 2018
Compliance with ethical standards
:
: The authors declare no potential conflicts of interest.