Xing, Yunli
Sun, Ying
Wang, Shan
Feng, Feng
Zhang, Deqiang
Li, Hongwei http://orcid.org/0000-0001-5900-7088
Funding for this research was provided by:
Beijing Municipal Administration of Hospitals Clinical Medicine Development of Special Funding Support (ZYLX201838)
Article History
Received: 3 November 2020
Accepted: 30 July 2021
First Online: 11 August 2021
Declarations
:
: The study protocol was approved by the Ethics Committee for Clinical Research of Beijing Friendship Hospital before the performance of the analyses (code: 2018-P2–120-01). This was a retrospective study, and only medical records were analyzed. All procedures involving human participants were performed in accordance with the ethical standards of the Ethics Committee for Clinical Research of Beijing Friendship Hospital and with the Declaration of Helsinki and its later amendments. The need to obtain participants’ consent was waived by the ethics committee.
: Not applicable.
: The authors declare that they have no competing interests.