Ren, Zhuo
Yue, Ling
Hu, Hua-ying
Hou, Xiao-lin
Chen, Wen-qi
Tan, Ya
Dong, Zhe
Zhang, Jing
Funding for this research was provided by:
Key Research and Development Program of Hebei Province (No.2137720D)
Article History
Received: 22 August 2023
Accepted: 24 April 2024
First Online: 29 April 2024
Declarations
:
: This study received approval from the Ethics Committee of Shijiazhuang Obstetrics and Gynecology Hospital (approval no. 20230160). Informed consent was taken from guardian’s of all minor participants. All procedures in this study were conducted in accordance with the principles outlined in the Declaration of Helsinki 1964, as well as its subsequent amendments and relevant ethical standards.
: Not applicable.
: The authors declare no competing interests.