Funding for this research was provided by:
National Key Research and Development Project of China (2020YFC0846300; 2019YFC1710301)
the National Science and Technology Key Projects on Prevention and Treatment of Major Infectious Disease of China (2020ZX10001002)
National Natural Science Foundation of China (71934002 and 81703240)
Article History
Received: 13 May 2021
Accepted: 28 June 2021
First Online: 8 July 2021
Declarations
:
: All analyses in our study were based on public data, thus no ethical approval is required.
: Not applicable.
: None declared.