Funding for this research was provided by:
Chongqing Municipal Public Health Bureau, Chongqing People’s Municipal Government (2020jstg026)
Chongqing Science and Technology Commission (2020MSXM042)
Article History
Received: 26 August 2021
Revised: 24 November 2021
Accepted: 30 November 2021
First Online: 13 December 2021
Competing interests
: The authors declare no competing interests.