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Authors
Wang, Zheng
Xu, Jia-Xin
Liu, Zhen
Li, Ruo-Yu
Wang, Zhi-Wei
Chang, Heng-Rui
Ding, Wen-Yuan
Yang, Da-Long
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Article History
Received: 17 March 2021
Accepted: 7 June 2021
First Online: 12 June 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.
: The authors declare no competing interests.
