Funding for this research was provided by:
young scientists fund (81200872)
Article History
Received: 22 February 2021
Accepted: 18 August 2021
First Online: 27 August 2021
Declarations
:
: The Research Ethics Review Board of the National Center for Health Statistics authorized the survey protocol, and all participants provided informed consent.
: Not applicable.
: Not applicable.
: The authors declare no competing interests.