Tian, Mei-Ling
Ma, Guo-Juan
Du, Li-Yan
Jin, Ying
Zhang, Cui
Xiao, Yuan-Ge
Tang, Zeng-jun
Funding for this research was provided by:
Youth Science and technology project of Hebei Health Commission (20190294)
Article History
Received: 29 December 2022
Accepted: 29 March 2023
First Online: 19 April 2023
Declarations
:
: This study was approved by the ethics committee of Hebei Women and Children’s Health Center. All methods were performed in accordance with the relevant regulations. We confirm that informed consent has been obtained from all subjects.
: Not applicable.
: The authors declare that they have no conflict of interest.