Ouyang, Peilin
Duan, Siqi
You, Yiping
Jia, Xiaozhou
Yang, Liqin
Article History
Received: 3 August 2022
Accepted: 3 May 2023
First Online: 2 June 2023
Declarations
:
: The study was approved by the ethics committee of Maternal and Child Health Hospital of Hunan Province and informed consent was obtained from all participants (Ethics Approval Number K202306). All methods carried out in this study involving human participants were in accordance with the of the international and/or national committee and With the ethical standards of the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Not applicable.
: The authors declare no competing interests.