Received: 2 July 2020
Accepted: 12 January 2021
First Online: 25 January 2021
Ethics approval and consent to participate
: The study was approved by the ethics committee of Shengjing Hospital of China Medical University (2017PS155J). All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2008. This study is a retrospective analysis, it did not include any human trial, and all participants provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.