Yang, Sishu
Lu, Jiong
Cai, Yulong
Li, Bei
Xiong, Xianze
Article History
Received: 17 May 2021
Accepted: 16 August 2021
First Online: 25 August 2021
Declarations
:
: All methods were performed in accordance with the Declaration of Helsinki. The present study was approved by the Institutional Ethical Board of West China hospital, Sichuan University. The requirement for informed consent was waived by the Institutional Ethical Board of West China hospital, Sichuan University due to the retrospective nature of the study.
: Not applicable.
: The authors declare that they have no competing interests.