Luo, Ling
Luo, Jing
Jiang, Yu
Article History
Received: 12 March 2022
Accepted: 25 May 2022
First Online: 2 June 2022
Declarations
:
: This study was performed in accordance with the Declaration of Helsinki, which was revised in 1983. The study was approved by the Institutional Review Board of the University-town Hopspital of Chongqing Medical University and all patient information in this study was handled anonymously. The need for informed consent was waived by the Institutional Review Board of University-town Hospital of Chongqing Medical University, because of the retrospective nature of the study.
: Not applicable.
: The authors declare no conflicts of interest.