Funding for this research was provided by:
National Natural Science Foundation of China (51704116)
Hunan Provincial Science and Technology Department (2018JJ3252, 19A264)
Article History
Received: 29 December 2019
Accepted: 20 April 2020
First Online: 1 May 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: Our study did not require an ethical board approval because it did not contain human or animal trials.