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Authors
Wang, Zhi-Wei
Wang, Zheng
Zhou, Yan-Hong
Sun, Jia-Yuan
Ding, Wen-Yuan
Yang, Da-Long
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Article History
Received: 17 February 2021
Accepted: 2 August 2021
First Online: 9 August 2021
Declarations
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: The study was approved by the ethical committee of The Third Affiliated Hospital of Hebei Medical University. The study the need for written informed consent was waived by the ethical committee of The Third Affiliated Hospital of Hebei Medical University due to retrospective nature of the study. All methods were carried out in accordance with relevant guidelines and regulations.
: Not applicable.
: None of the authors has any potential competing interests.
