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Article History

Received: 16 September 2022

Accepted: 26 December 2022

First Online: 5 January 2023

Declarations

:

: The experimental protocol was approved by the ethical board of Kamachi Group Hospitals (No. 173) and Sapporo-Kosei General Hospital (No. 597). All research activities complied with all relevant ethical regulations and were performed in accordance with relevant guidelines and regulations in the all hospitals mentioned above. Informed consent to use histopathological samples and pathological diagnostic reports for research purposes had previously been obtained from all patients prior to the surgical procedures at all hospitals, and the opportunity for refusal to participate in research had been guaranteed by an opt-out manner.

: Not Applicable

: F.K. and M.T. are employees of Medmain Inc. All authors declare no competing interests.