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Authors
Gu, Linni
Tian, Bo
Xin, Yujia
Zhang, Shengfa
Li, Jing
Sun, Zhijun
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Article History
Received: 5 November 2020
Accepted: 21 July 2022
First Online: 29 September 2022
Declarations
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: All methods were performed in accordance with the Declaration of Helsinki. This study was approved by the Ethics Committee of the School of Social Development and Public Policy at the Beijing Normal University. All the participants provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.
