Chen, Xiqian
Ren, Yijun
Zhang, Yiliu
Lu, Wei
Article History
Received: 2 April 2020
Accepted: 23 July 2020
First Online: 31 July 2020
Compliance with ethical standards
:
: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
: This study was approved by the local ethics committee.
: The committee allowed the study to be conducted without patients’ consent because of the retrospective nature of the study.