Funding for this research was provided by:
National Natural Science Foundation of China (11661056, 11401293, 11771198)
Postdoctoral Research Foundation of China (2015M571989)
Postdoctoral Science Foundation of Jiangxi Province (2015KY51)
Article History
Received: 12 February 2019
Accepted: 10 May 2019
First Online: 20 May 2019
Competing interests
: The authors declare that they have no competing interests.