Han, Jian
Sun, Jiaqing
Yuan, Lin
Lou, Luyao
Jiang, Xiaofeng
Article History
Received: 14 November 2024
Accepted: 18 April 2025
First Online: 9 May 2025
Declarations
:
: This study was conducted in accordance with the Declaration of Helsinki and received approval from the Ethics Review Board of the National Center for Health Statistics. All participants provided written informed consent, and for participants under 16 years of age, consent was obtained from their parents or legal guardians.
: Not applicable.
: The authors declare no competing interests.