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Article History

Received: 28 January 2025

Accepted: 3 March 2026

First Online: 7 March 2026

Declarations

:

: This research was approved by the ethics committee of the Okayama University (Registration number: K1908-004, Clinical trial number: not applicable). All procedures were performed following the ethical standards of the institutional and/or national research committee and the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards. The requirement for informed consent was waived by the ethics committees/institutional review boards because of the retrospective nature of the study.

: Not applicable.

: The authors declare no competing interests.