Yao, Qianqian
Liu, Mengke
Yuan, Kemei
Xin, Yue
Qiu, Xiaoqian
Zheng, Xiuzhu
Li, Changqin
Duan, Shaofeng
Qin, Jian
Article History
Received: 16 November 2021
Accepted: 28 April 2022
First Online: 6 May 2022
Declarations
:
: Not applicable.
: Ethics committee/IRB of The Second Affiliated Hospital of Shandong First Medical University approved this study and informed consent waiver.All methods were carried out in accordance with relevant guidelines and regulations. The need for obtaining signed informed consent was waived for retrospective analysis.
: The authors declare that they have no competing interests.