Zhang, HuanRui
Dou, BaoJun
Chen, XiTao
Sun, XiaoDi
Article History
Received: 11 January 2025
Accepted: 26 March 2025
First Online: 9 April 2025
Declarations
:
: The study protocol was approved by the Ethics Review Board of the National Center for Health Statistics (). Written informed consent was obtained from all participants.
: Not applicable.
: The authors declare no competing interests.