Tang, Benqiang
Xu, Songjie
Chen, Xueming
Cui, Libin
Wang, Yanhui
Yan, Xin
Liu, Yadong
Article History
Received: 23 March 2021
Accepted: 31 August 2021
First Online: 18 September 2021
Declarations
:
: This study was approved by the Institutional Ethics Committees of Beijing Luhe Hospital, and was conducted in compliance with the ethical principles of the Helsinki Declaration of 1975. Before operation, all participants signed the informed consent of treatment protocol as well as surgical procedure and provided the consent to publish or report individual clinical data. Because we utilized already available data that did not retain personal identifiers in the process of collection in this retrospective study, informed consent to this study was waived, which also approved by the Institutional Ethics Committee.
: Not Applicable.
: None.