Funding for this research was provided by:
National Natural Science Foundation of China (71501186, 61702543)
National Natural Science Foundation of China (61806221)
Article History
First Online: 31 May 2019
Compliance with ethical standards
:
: Authors Xiuli Qi, Xiaohan Yu, Lei Wang, Xianglin Liao, Suojuan Zhang declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.