Funding for this research was provided by:
Shanghai Science and Technology Commission, China (20Y11901700, 20DZ2200500)
Shandong Science and Technology Commission, China (ZR2019MH016)
Received: 18 October 2020
Accepted: 20 April 2021
First Online: 29 April 2021
: The ethics committee of Wuhan Infectious Diseases Hospital granted a waiver of informed consent from study participants (KY-2020-03-01). The data used in this study was anonymised before its use.
: Not applicable. No individual person’s data was shown separately. All data are presented as a whole.
: The authors declare no competing interests.