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Article History

Received: 3 December 2024

Accepted: 29 May 2025

First Online: 1 July 2025

Declarations

:

: This study was performed in the line with the principles of the Declaration of Helsinki. Approval was granted by the Institutional Review Board of Zhengzhou University (2021 − 126; Date: 01/11/2021), Nepal Health Research Council(195/2022: Date: 27/07/2022),Kanti Children’s Hospital (01/079–80 (2022) Date: 05/08/2022), Bhaktapur Cancer Hospital (481/079/80, Date: 30/11/2022) and B.P.Koirala Memorial Cancer Hospital (1063/2019/080; Date:03/01/2023). Informed consent was taken from parent of the children and ascent was taken form children age 7 years and above.

: Not applicable.

: The authors declare no competing interests.