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Authors
Shen, Shuqun
Li, Xing
Yuan, Chao
Huang, Qin
Liu, Dongyang
Ma, Shuoyi
Hui, Jialiang
Liu, Ruiyu
Wu, Tongwei
Chen, Qing http://orcid.org/0000-0002-8450-9300
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Article History
Received: 7 August 2019
Accepted: 13 February 2020
First Online: 21 February 2020
Ethics approval and consent to participate
: The protocol of study and accessing the hospital admission data was approved by the ethics committee of School of Public Health of Southern Medical University, and was performed in accordance with the ethical standards noted in the 1964 Declaration of Helsinki and its later amendments.
: Not applicable.
: The authors declare that they have no competing interests.
