Article History
Received: 4 May 2023
Accepted: 26 December 2023
First Online: 31 January 2024
Declarations
:
: The authors declare that they have no competing interests.
: Not applicable.
: The study was approved by the academic and ethical committee of Nanjing Municipal Center for Disease Control and Prevention (approval number: PJ2016-B001-01). Written informed consent was obtained from each participant prior to the survey.
: Not applicable.