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Authors
Shu, Wen
Li, Menglong
Amaerjiang, Nubiya
Fan, Xin
Lin, Shunna
Segura-Pérez, Sofia
Pérez-Escamilla, Rafael
Hu, Yifei https://orcid.org/0000-0002-4611-2206
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Funding
Funding for this research was provided by:
Natural Science Foundation of Beijing Municipality (7202009)
National Natural Science Foundation of China (82073574)
Beijing Municipal Commission of Education (KM201810025009)
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Article History
Received: 24 November 2020
Accepted: 17 March 2021
First Online: 1 May 2021
Declarations
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: Ethical approval for this study has been granted from the Ethics Committee of Capital Medical University (No. Z2019SY001). We will follow the guidance of the Declaration of Helsinki and later amendments as well as comparable international ethical standards. All participants sign online electronic informed consent before each wave of the survey during the study period.
: No applicable.
: The authors declare that they have no competing interests.
