Chen, Guixia
Xu, Rongxian
Zhang, Jiyong
Yang, Meifeng
Fan, Jianxia
Huang, Yinying
Sun, Xiaoling
Funding for this research was provided by:
WHO (CHN-11-MCN-005192)
Article History
Received: 30 September 2022
Accepted: 11 April 2024
First Online: 30 April 2024
Declarations
:
: This study was approved by the Ethics Committee of Xiamen Maternity and Child Health Hospital (approval number KY-2021-038-K02). The requirement for informed consent was waived by the Ethics Committee of Xiamen Maternity and Child Health Hospital because of the retrospective nature of the study. All procedures were performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and the Good Clinical Practices. I confirm that all methods were performed in accordance with the relevant guidelines.
: Not applicable.
: The authors declare no competing interests.