Liu, Yanglu
Yin, Qiaozhi
Xu, Fan
Luo, Shuang
Article History
Received: 28 August 2021
Accepted: 26 May 2022
First Online: 30 July 2022
Declarations
:
: This study was approved by Medical Research Ethics Review Committee of Suining Central Hospital. The reference number of the committee is LLSLH20190004. We conformed to the principles of the Helsinki Declaration, and all methods were carried out in accordance with relevant guidelines. Because of the retrospective study design, informed consent was waived by the Medical Research Ethics Review Committee of Suining Central Hospital. The relevant information exemption letters were posted in the hospital and other public places near the hospital.
: Not applicable.
: The authors declare that they have no competing interesting.