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Authors
Chen, Feng
Lin, Hao
Zhang, Yuansi
Zhang, Yu
Chu, Maoping
Pan, Lulu
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Article History
Received: 7 June 2024
Accepted: 20 October 2024
First Online: 2 November 2024
Declarations
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: The survey protocol (Protocol #2011-17, Continuation of Protocol #2011-17) received approval from both the National Center for Health Statistics (NCHS) Ethics Review Board and the Centers for Disease Control and Prevention (CDC), and the study was carried out following the guidelines of the Declaration of Helsinki (revised in 2013). Written informed consent was obtained from all participants.
: Every participant in the study gave their written informed consent before taking part.
: The authors declare no competing interests.
