Hu, Fei https://orcid.org/0000-0002-8016-9564
Li, Li https://orcid.org/0000-0003-4818-8770
Xu, Xiaofei
Wang, Jingyuan
Zhang, Jinjing
Funding for this research was provided by:
Natural Science Foundation of China (61170192)
Scientific and Technological Research Program of Chongqing Municipal Education Commission (KJ1501405)
Article History
Received: 29 June 2017
Accepted: 27 December 2017
First Online: 21 February 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.