Zhang, Zhengyu
Mei, Lingwei
Li, Li
Xiao, Jumei
Wu, Xiaoxin http://orcid.org/0000-0001-9785-8916
Yuan, Yuan
Funding for this research was provided by:
Chongqing municipal health and Health Committee maternal and child management project (2023FY205)
Natural Science Foundation of Zhejiang Province (LQ21H190004)
Article History
Received: 9 June 2023
Accepted: 28 October 2023
First Online: 10 November 2023
Compliance with ethical standards
:
: The authors declare no competing interests.
: The study protocol was reviewed and approved by the ethics committee of Women and Children’s Hospital of Chongqing Medical University, Ethical approval No. 2022(011). The study was performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. Since this was a retrospective study, informed consent was not required (The informed consent was waived by the ethics committee of the Women and Children’s Hospital of Chongqing Medical University).