Feng, Chaoqun
Yao, Junjie
Xie, Yizhou
Yang, Fei
Fan, Xiaohong
Funding for this research was provided by:
Natural Science Foundation of Sichuan Province (23NSFSC2296)
Article History
Received: 24 August 2023
Accepted: 2 January 2024
First Online: 10 January 2024
Declarations
:
: The survey protocols received approval from the Ethics Review Board of the National Center for Health Statistics (NCHS), and documented consent was obtained from participants (Protocol #98 − 12, Continuation of Protocol #2005-06).
: Not applicable.
: The authors declare no competing interests.