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Authors
Zhang, Jinyan
Zhou, Shenghong
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Funding
Funding for this research was provided by:
Shandong Provincial Natural Science Foundation (ZR202ZY018)
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Article History
Received: 16 January 2025
Accepted: 27 May 2025
First Online: 6 June 2025
Declarations
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: The study protocol (Protocol Number: Protocol #2005–06 and Protocol #2011–17) was approved by the National Center for Health Statistics (NCHS) Research Ethics Review Board (ERB) ().
: Not applicable.
: The authors declare no competing interests.
