Funding for this research was provided by:
Youth Foundation of Hunan Educational Committee (17B128)
Natural Science Foundation of Hunan Province, China (2018JJ3229)
the Hunan Innovation Platform Open Fund Project (17K046)
Article History
Received: 17 May 2019
Accepted: 28 June 2019
First Online: 5 August 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.