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Authors
Zhang, Huihui
Liu, Yini
Chen, Fangyao
Mi, Baibing
Zeng, Lingxia
Pei, Leilei
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Funding
Funding for this research was provided by:
National Natural Science Foundation of China (81602928, 81541069)
COVID-2019 Emergency Prevention Science and Technology Project of Xi’an City (2020005YX005)
Natural Science Foundation of Shaanxi Province (2017JM8102)
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Article History
Received: 30 September 2020
Accepted: 29 April 2021
First Online: 7 May 2021
Declarations
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: Our study was conducted following the Declaration of Helsinki guidelines [CitationRef removed]. All the data used in our study was from the public data on the official website of the government and didn’t involve copyright issues. To protect the privacy of the individuals, all data analyzed were anonymized in occasion of data use, processing, sharing and interaction. None of the study personnel could see the personal information of individuals.
: Not applicable.
: The authors declare that they have no competing interests.
