Huang, Wei
Sun, Ying
Xing, Yunli
Wang, Cuiying
Funding for this research was provided by:
Beijing Municipal Administration of Hospitals Incubating Program (Project No PX20160103)
Article History
Received: 1 December 2018
Accepted: 30 September 2019
First Online: 15 October 2019
Ethics approval and consent to participate
: The study protocol was approved by the Ethics Committee for Clinical Research of Beijing Friendship Hospital before the performance of the analyses (code: 2017-P2–124-01). 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.