Liu, Gangtie
Ye, Hengbo
Cheng, Qian
Zhao, Jian
Ma, Congcong
Jie, Huichao
Article History
Received: 15 June 2023
Accepted: 25 August 2023
First Online: 1 September 2023
Declarations
:
: Only publicly available data were obtained in the present study, and the Ethics Committee of Taian Maternal and Child Healthcare Hospital exempted from the requirement of the ethical review. Informed consent has been waived from all participants’ guardians and kins. All methods of the study were conducted in line with the Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.