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Authors
Zheng, Nan
Zhang, Jun https://orcid.org/0000-0003-3787-875X
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Article History
Received: 13 April 2022
Accepted: 17 June 2022
First Online: 13 July 2022
Declarations
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: This study was approved by the Medical Ethics Committee of Cangzhou Central Hospital (No. 2021-091-01) and conducted in accordance with the Declaration of Helsinki. Informed consent was waived given the retrospective nature of this study.
: Not applicable.
: Not applicable.
: Not applicable.
: The authors declare no competing interests.
