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Authors
Zhao, Hai-Cheng
Xu, Qing-Song
Shi, Yi-Bing
Ma, Xi-Juan
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Article History
Received: 26 April 2021
Accepted: 1 September 2021
First Online: 5 September 2021
Declarations
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: This single-center study was approved by Ethics Committee of Xuzhou Central Hospital. Because of its retrospective nature, the need for written informed consent was waived by the Ethics Committee of Xuzhou Central Hospital. All methods were carried out in accordance with Declaration of Helsinki.
: Not applicable.
: The authors declare no competing interests.
