Zheng, Xiaoyun
Wang, Hong
Wu, Huiwen
Article History
Received: 23 November 2022
Accepted: 22 March 2023
First Online: 13 April 2023
Declarations
:
: In this study, our data was accessed from NHANES (a publicly available database). For participants enrolled in NHANES, they are required to provide a written informed consent from a parent and/or legal guardian for study participation. Thus, the requirement of ethical approval for this study was waived by the Institutional Review Board of Maternal and Child Health Hospital of Hubei Province, because the data All methods were carried out in accordance with relevant guidelines and regulations (declaration of Helsinki).
: Not applicable.
: The authors declare no competing interests.