Funding for this research was provided by:
National Key R&D Program of China (2017YFC0404801)
National Natural Science Foundation of China (51579193)
Fundamental Research Funds for the Central Universities (2042017kf0277)
The Major Special Project of Guizhou Province ((2017)6013-2)
Article History
Received: 23 August 2018
First Online: 22 August 2019
Compliance with ethical standards
:
: The all authors declare that no conflict of interest exists in the submission of this manuscript and that it is compliant with ethical standards.