Sun, Ruixue
Zhang, Hui
Xu, Yingchun
Zhu, Huadong
Yu, Xuezhong
Xu, Jun
Article History
Received: 6 August 2020
Accepted: 9 December 2020
First Online: 6 January 2021
Ethics approval and consent to participate
: The Institutional Review Board (IRB) of Peking Union Medical College Hospital has reviewed the study and has determined that this is a retrospective study and the design is scientifically and is up to the ethics standards. The IRB thus approve the study.
: Consent for publication has been obtained from the patients reported in this article. And each patients next-of-kin have given written consent for their relative’s personal or clinical details along with any identifying images to be published in this study.
: The authors declare that they have no conflicts of interests.