Document is current
Any future updates will be listed below
-
Authors
Li, Xiao
Pang, Shujie
Shen, Yan
Qu, Pengpeng
-
Funding
Funding for this research was provided by:
Tianjin Science and Technology Planning Project (NO.21JCYBJC01410)
Tianjin Health Research Project (NO.ZC20144)
Tianjin Science and Technology Committee Fund Project (NO.19YFZCSY00600)
- License Information
-
More Information
Article History
Received: 28 March 2022
Accepted: 21 November 2022
First Online: 2 December 2022
Declarations
:
: This retrospective analysis was exempt from ethics committee approval at Tianjin Central Hospital of Gynecology and Obstetrics, because the committee did not consider approval was necessary for a retrospective chart review. The data were collected through the electronic medical records of the institution while preserving patient anonymity, and the Ethics Committee of Tianjin Central Hospital of Gynecology and Obstetrics waived the requirement for informed consent because the study used previously stored data. Administrative permissions were not required to access and use the medical records described in our study. All methods in our study were carried out in accordance with relevant guidelines and regulations (declarations of Helsinki).
: Not applicable.
: The authors declare that they have no competing interests.
