Xing, Shiyi
Ju, Jianguo
Xing, Jinsheng
Funding for this research was provided by:
Shanxi soft science fund project of China (2011041033-03)
Article History
Received: 23 March 2018
Accepted: 11 May 2018
First Online: 7 August 2018
Compliance with ethical standards
:
: The authors declared that they have no conflicts of interest to this work. We declare that we do not have any commercial or associative interest that represents a conflict of interest in connection with the work submitted.