Funding for this research was provided by:
National Natural Science Foundation of China (51305473)
Project Funded by China Postdoctoral Science Foundation (2014M552317)
Postdoctoral Science Funded Project of Chongqing (xm2014032)
Foundation and Advanced Research Program General Project of Chongqing City, China (cstc2014jcyjA60006)
Article History
Received: 17 January 2017
Accepted: 12 July 2018
First Online: 18 July 2018
Compliance with Ethical Standards
:
: The authors declare no conflict of interests, including specific financial interests and relationships relevant to the subject of this paper.