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Authors
Zhu, Gaopei https://orcid.org/0000-0002-2085-9336
Zhu, Yuhang https://orcid.org/0000-0002-9236-2812
Wang, Zhongli
Meng, Weijing
Wang, Xiaoxuan
Feng, Jianing
Li, Juan https://orcid.org/0000-0001-8710-4854
Xiao, Yufei
Shi, Fuyan
Wang, Suzhen https://orcid.org/0000-0003-2076-529X
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Funding
Funding for this research was provided by:
The National Natural Science Foundation of China (81872719)
The National Natural Science Foundation of China (81803337)
The National Bureau of Statistics Foundation Project (2018LY79)
Natural Science Foundation of Shandong Province (ZR2019MH034)
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Article History
Received: 8 July 2020
Accepted: 25 December 2020
First Online: 11 January 2021
Ethics approval and consent to participate
: This was an observational study using national registry data from public platforms. The medical ethics were exempted during the epidemic.
: Not applicable.
: The author declares that he has no competing interests.
