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Authors
Xu, Wuping
Xu, Xuedong
Zhang, Min
Sun, Chiping
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Article History
Received: 21 January 2024
Accepted: 7 May 2024
First Online: 10 May 2024
Declarations
:
: The protocols were approved by the Ethics Review Board of the NationalCenter for Health Statistics and conformed to the tenets of the Declaration of Helsinki. Informed consent was obtained from each subject.
: Not applicable.
: The authors declare no competing interests.
