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Article History

Received: 30 December 2024

Accepted: 7 March 2025

First Online: 20 March 2025

Declarations

:

: This study was conducted in accordance with the ethical principles outlined in the Declaration of Helsinki ( helsinki/). Ethical approval for this research was obtained from the Ethics Committee of the Public Health and Clinical Center of Chengdu (No.: PJ-K2020-26-01). The ethics committee/institutional review board waived the requirement for written informed consent from the participants or their legal guardians/next of kin due to the retrospective nature of the study, the use of anonymized data, and the provision of comprehensive verbal and written information to all patients regarding the study’s purpose and potential implications. The study was conducted in accordance with local legislation and institutional requirements.

: All of the participants understand that the information will be published without their child or ward’s/their relative’s (circle as appropriate) name attached but that full anonymity cannot be guaranteed. All of the participants understand that the text and any pictures or videos published in the article will be freely available on the internet and may be seen by the general public. The pictures, videos and text may also appear on other websites or in print and may be translated into other languages or used for commercial purposes. All of the participants were offered the opportunity to read the manuscript.

: The authors declare no competing interests.