Zhou, Yongmei
Chen, Yu
Chen, Fuli
Li, Gang
Zhou, Long
Funding for this research was provided by:
National Natural Science Foundation of China (81600259)
Science and Technology Project of Sichuan Provincial Health Commission (23LCYJ045)
Article History
Received: 28 July 2023
Accepted: 28 January 2024
First Online: 6 February 2024
Declarations
:
: All methods were carried out in accordance with the Declaration of Helsinki and the study protocol was approved by the National Center for Health Statistics (NCHS) Research Ethics Review Board (Protocol #2011-17). Informed consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.