Shen, Jianghua
Chu, Yanqi
Wang, Chaodong
Yan, Suying
Funding for this research was provided by:
Beijing Municipal Commission of Health and Family Planning (PXM2017_026283_000002, PXM2017_026283_000002, PXM2017_026283_000002, PXM2017_026283_000002)
Article History
Received: 25 August 2021
Accepted: 12 May 2022
First Online: 23 June 2022
Declarations
:
: This study was approved by the Institutional Review Board of Xuanwu Hospital of Capital Medical University (approval No. 096[2018]), who granted a waiver of patients' informed consent due to the retrospective nature of the study. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee at which the studies were conducted.
: Not applicable.
: The authors declare that they have no competing interests.