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Authors
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Funding
Funding for this research was provided by:
The National Social Science Fund of China (16ZDA237)
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Article History
Received: 23 October 2020
Accepted: 18 February 2021
First Online: 13 March 2021
Declarations
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: The authors declare that they have no competing interests.
: This study was evaluated and approved by the Ethics Review Committee of the Ethical Institute of the School of Public Health, Fudan University.
