Qu, Li
Zuo, Xiaole
Yu, Jing
Duan, Ran
Zhao, Botao
Article History
Received: 23 March 2023
Accepted: 1 September 2023
First Online: 14 September 2023
Declarations
:
: The requirement of ethical approval for this was waived by the Institutional Review Board of Taian Maternity and Child Health Hospital, because the data was accessed from NHANES (a publicly available database). The need for written informed consent was waived by the Institutional Review Board of Taian Maternity and Child Health Hospital due to retrospective nature of the study. All methods were performed in accordance with the relevant guidelines and regulations.
: Not applicable.
: The authors declare that they have no competing interests.