Wang, Zheng
Sun, Jianbin
Yan, Jun
Gao, Pengcheng
Zhang, Hao
Yang, Yong
Jin, Qunhua
Article History
Received: 15 April 2020
Accepted: 17 August 2020
First Online: 22 August 2020
Ethics approval and consent to participate
: Ethical approval was obtained from the Ethics Committee of General Hospital of Ningxia Medical University, China. The requirement for patients’ informed consent was waived due to the retrospective study design.
: Not applicable.
: The authors declare that they have no competing interests.