Funding for this research was provided by:
the National Key Program on Stem Cell and Translational Research (2018YFA0107804)
the National Natural Science Foundation of China (91842301, 31722027)
Article History
Received: 19 November 2019
Accepted: 23 April 2020
First Online: 6 July 2020
Competing interests
: The authors declare that they have no competing interests.