Wang, Luying
Cheng, Linbo
Zhang, Shimao
Su, Mi
Jin, Ying
Luo, Dan
Article History
Received: 11 January 2023
Accepted: 9 May 2023
First Online: 25 May 2023
Declarations
:
: The requirement of ethical approval for this was waived by the Institutional Review Board of Chengdu Women’s and Children’s Central Hospital, School of Medicine, University of Electronic Science and Technology of China, because the data was accessed from NVSS (a publicly available database). All individuals provided written informed consent before participating in the study. All methods were carried out in accordance with relevant guidelines and regulations (declaration of Helsinki).
: Not applicable.
: The authors declare no competing interests.