Funding for this research was provided by:
National Natural Science Foundation of China (61472269)
National Natural Science Foundation of China (61403272)
Article History
First Online: 23 January 2019
Compliance with ethical standards
:
: Author Haibo Yu declares that he has no conflict of interest. Author Ying Tan declares that she has no conflict of interest. Author Chaoli Sun declares that she has no conflict of interest. Author Jianchao Zeng declares that he has no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.