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Authors
Wang, Gaoling
Zhou, Yuqin
Duan, Jing
Kan, Qianqian
Cheng, Zhaopeng
Tang, Shaoliang
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Funding
Funding for this research was provided by:
National Natural Science Foundation of China (72074125)
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Article History
Received: 14 November 2022
Accepted: 21 June 2023
First Online: 5 July 2023
Declarations
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: All methods were carried out in accordance with relevant guidelines and regulations. All respondents gave informed written consent before they were interviewed, and the current study was reviewed and approved by the Biomedical Ethics Review Board of Peking University. Informed consent to participate was taken from parents/legal guardians of illiterate and minor participants. The ethical approval number is IRB00001052-11015.
: Not applicable.
: The authors declare no competing interests.
