Document is current

Article History

Received: 12 January 2026

Accepted: 25 March 2026

First Online: 1 April 2026

Declarations

:

: The study protocol was reviewed and approved by the Research Ethics Committee of Hebei Children’s Hospital. All procedures were conducted in accordance with the ethical principles outlined in the Declaration of Helsinki. Written informed consent was obtained from the legal guardians of all participants younger than 18 years prior to enrollment. Research data were securely stored and managed in compliance with institutional privacy and data protection regulations.

: Not applicable.

: The authors declare no competing interests.