Funding for this research was provided by:
National Natural Science Foundation of China (11661009)
Guangxi Science Fund for Distinguished Young Scholars (2015GXNSFGA139001)
Guangxi Natural Science Key Fund (2017GXNSFDA198046)
Article History
Received: 11 March 2019
Accepted: 1 July 2019
First Online: 15 July 2019
Competing interests
: There is no potential conflicts of interest.