Funding for this research was provided by:
Chongqing Municipal Education Commission (KJ1600239)
Chongqing Science and Technology Commission (csts2016kjhmpt1001-5)
Article History
Received: 21 September 2019
Accepted: 5 December 2019
First Online: 12 December 2019
Compliance with ethical standards
:
: The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work was supported by the Chongqing Municipal Education Commission Science and Technology Research Project (KJ1600239), Chongqing Science and Technology Commission Science and Technology Huimin Project (csts2016kjhmpt1001-5), without any financial interest or benefit.