Li, Xusheng
Hou, Qian
Zhan, Xuehua
Chang, Long
Ma, Xiaobing
Yuan, Haifeng
Article History
Received: 24 May 2021
Accepted: 20 December 2021
First Online: 13 January 2022
Declarations
:
: This study was conducted in accordance with the ethical guidelines of the Declaration of Helsinki. This retrospective study was approved by the Research Ethics Committee of the General Hospital of Ningxia Medical University. Informed consent was obtained from all patients for this study, all patients agreed to participate in the study.
: All patients agreed to have their data published.
: The authors declare that there is no conflict of competing financial and non-financial interests.