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Authors
Wang, Bo
Gao, Songting
Zhu, Zhongxin
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Article History
Received: 22 May 2025
Accepted: 3 July 2025
First Online: 10 July 2025
Declarations
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: All protocols were approved by the National Center for Health Statistics research ethics review board, with written informed consent obtained from parents of participants aged 2–17 years, assent from youths aged 7–17 years, and direct consent from young adults aged 18–19 years.
: Not applicable.
: The authors declare no competing interests.
