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Authors
He, Huabin
Xiao, Xifeng
Yang, Junjun
Lei, Meixian
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Article History
Received: 25 August 2024
Accepted: 30 October 2024
First Online: 4 December 2024
Declarations
:
: The authors declare no competing interests.
: All procedures performed in studies involving human participants were following the ethical standards of the institutional and national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. All participants provided written informed consent. And this survey was approved by the Ethics Review Board of the National Center for Health Statistics.
: Informed consent was obtained from all individual participants included in the study.
