Fu, Liang
Xie, Hualin
Shi, Shuyun
Funding for this research was provided by:
The Scientific and Technological Research Program of Chongqing Municipal Education Commission (KJ1601224)
National Natural Science Foundation of China (81603400)
Article History
Received: 27 December 2017
Revised: 13 March 2018
Accepted: 20 March 2018
First Online: 12 April 2018
Compliance with ethical standards
: This article does not contain any studies with humans or animals.
: The authors declare that they have no competing interests.