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Authors
Yao, Chengyun
Yu, Hongliang
Zhou, Guoren
Xu, Jianhua
Gu, Dayong
Yin, Li
He, Xia
Xia, Hongping https://orcid.org/0000-0001-6454-2333
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Article History
Received: 22 October 2020
Accepted: 25 February 2021
First Online: 10 March 2021
Declarations
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: This study was approved by the Clinical Research Ethics Committee of Nanjing medical university (#2019051). The procedures involving human subjects were in accordance with the Declaration of Helsinki. Based on the retrospective nature and invisibility of individual identifiable information in this study, informed consents were waived.
: The authors declare that they have no conflict of interest.
