Wu, Hongjuan
Xiong, Jiang
Hu, Xiang
Feng, Yuming
Li, Liangliang
Funding for this research was provided by:
Chongqing Municipal Key Laboratory of Institutions of Higher Education ([2017]3)
Program of Chongqing Development and Reform Commission (2017[1007])
Article History
Received: 14 August 2017
Accepted: 14 December 2017
First Online: 16 January 2018
Competing interests
: The authors declare that they have no competing interests.