Funding for this research was provided by:
National Natural Science Foundation of China (51674079)
Postdoctoral Research Foundation of China (2016M600211)
Article History
Received: 28 October 2018
Accepted: 11 December 2018
First Online: 14 December 2018
Compliance with ethical standards
:
: The authors declared no potential conflicts of interest with respect to the research, authorship and/or publication of this article.
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