Funding for this research was provided by:
National Natural Science Foundation of China (51905163, 51875188)
Natural Science Foundation of Hunan Province (2019JJ50053)
Article History
Received: 11 December 2019
Revised: 24 April 2020
Accepted: 11 May 2020
First Online: 21 May 2020
Compliance with ethical standards
:
: Authors declare that we do not have any commercial or associative interest that represents a conflict of interest in connection with the work submitted.
: Authors state that the research was conducted according to ethical standards without any potential conflicts of interest, and it did not involve human participants and/or animals.