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Authors
Fang, Liang
Yin, Jianfeng
Dai, Anna
Niu, Maijun
Li, Xingjiang
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Article History
Received: 28 September 2025
Accepted: 9 January 2026
First Online: 14 January 2026
Declarations
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: All protocols were approved by the ethics review board of the National Center for Health Statistics (#2011-17, #2018-01), and written informed consents were obtained from the participants.
: Not applicable.
: The authors declare no competing interests.
