Funding for this research was provided by:
National Natural Science Foundation of China (81772127)
Postdoctoral Science Foundation of China (2019M663260)
Medjaden Academy & Research Foundation for Young Scientists (COVID-19-MJA20200301)
Article History
Accepted: 24 April 2020
First Online: 8 May 2020
Compliance with ethical standards
:
: We declare no competing interests.
Free to read: This content has been made available to all.