Han, Tao
Qiu, Meng
Niu, Xinxin
wang, Shumei
Wang, Feng
Cao, Jingke
Tang, Shanghong
Cheng, Liping
Mei, Yabo
Liang, Huayu
Feng, Zhichun
Chen, Geyu
Li, Qiuping
Funding for this research was provided by:
Military Family Planning Special Research Project of China (20JSZ16)
National Key R&D Program of China (2021YFC 2701700)
Article History
Received: 3 January 2024
Accepted: 27 April 2024
First Online: 23 May 2024
Declarations
:
: This study protocol follows the principle stated in the Declaration of Helsinki, and the study was approved by the research ethics board of the Seventh Medical Center of the Chinese PLA General Hospital (Beijing, China), with a waiver of informed consent from this ethics board because of the retrospective design of the study. Since no personal identifiable information was used in this analysis, the need for informed personal consent was waived by the ethics board.
: Not applicable.
: The authors declare no competing interests.