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Authors
Xu, Jing
Li, Hongxin
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Article History
Received: 19 June 2023
Accepted: 9 January 2024
First Online: 18 January 2024
Declarations
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: The requirement of ethical approval for this was waived by the Institutional Review Board of Children’s Hospital Affiliated to Capital Institute of Pediatrics, 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 Children’s Hospital Affiliated to Capital Institute of Pediatrics due to retrospective nature of the study. All methods were carried out in accordance with relevant guidelines and regulations (declaration of Helsinki).
: Not applicable.
: The authors declare that they have no competing interests.
