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Authors
Jiang, He
Huang, Yanshuo
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Funding
Funding for this research was provided by:
Hunan Postgraduate Research Innovation Funding Project (2022XC013, CX20210529)
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Article History
Received: 21 August 2022
Accepted: 24 February 2023
First Online: 7 March 2023
Declarations
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: This study used data from the CMDS. Ethics approval was not required to analyze these data. Migrant Population Service Center,National Health Commission P.R.China approved the CMDS and all participants were required to provide a written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.
