Funding for this research was provided by:
Key Research Project of the Ministry of Science and Technology of China (No. 2016YFC0904400)
the Science and Technology Department Funds of Hunan Province Key Project (No.2016JC2057)
the Science and Technology Department Funds of Hunan Province Key Project (No.2018JJ3822)
Article History
Received: 27 March 2019
Accepted: 16 August 2019
First Online: 23 August 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.