Funding for this research was provided by:
National Natural Science Foundation of China (No. 11504312)
Science and Technology Program of Xiangtan (No. CXY-ZD20172002)
Changjiang Scholars and Innovative Research Team in University (IRT_17R91)
Article History
Received: 1 November 2018
Accepted: 3 January 2019
First Online: 8 January 2019
Compliance with ethical standards
:
: There is no conflict of interest between all authors.