Huang, Jin-Ying
Feng, Wei
Sang, Guo-Xin
McDonald, Stuart
He, Tian-Feng
Lin, Yi
Article History
Received: 7 February 2024
Accepted: 31 May 2024
First Online: 10 June 2024
Declarations
:
: This study followed guidelines proposed by Ningbo Municipal Center for Disease Control and Prevention (CDC). All procedures involving human subjects were approved by Institutional Review Board of Ningbo Municipal CDC. A waiver of informed consent was taken by Institutional Review Board of Ningbo Municipal CDC (No. 2021010) as the data analyzed in this study were at the secondary aggregated level, and no participants were contacted.
: Not applicable.
: The authors declare no competing interests.