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Authors
Guo, Jinyan
Ren, Zhigang
Li, Jianhao
Li, Tianfang
Liu, Shengyun
Yu, Zujiang
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Article History
Received: 16 January 2020
Accepted: 2 June 2020
First Online: 26 June 2020
Ethics approval and consent to participate
: This study was approved by the Ethical Committee of the First Affiliated Hospital of Zhengzhou University, ethical approval number no.2019-KY-199.
: All the results presented in this article are in aggregate form, and no personally identifiable information was used for this study.
: The authors declare that they have no competing interests.
