Funding for this research was provided by:
National Natural Science Foundation of China (71471062, 71431004, 71632008)
National Social Science Foundation of China (16ZDA083)
the Ministry of Education Humanities and Social Science Research Planning Fund Project (18YJAZH046)
Natural Science Foundation of Shanghai (18ZR1409400)
Article History
First Online: 13 May 2019
Compliance with ethical standards
:
: Author Yifan Wu declares that he has no conflict of interest. Author Fan Pan declares that he has no conflict of interest. Author Shuxia Li declares that she has no conflict of interest. Author Zhen Chen declares that he has no conflict of interest. Author Ming Dong 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.