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Page 6 of 6 Igarashi et al. Hepatoma Res 2022;8:21 https://dx.doi.org/10.20517/2394-5079.2022.02

Ethical approval and consent to participate
At our Institution, the day before surgery all patients sign an informed consent which comprehends data
collection in anonymized form (video recording included), so no external ethical approval was necessary in
this case.

Consent for publication
Written informed consent was obtained from the patient before the surgery.

Copyright
© The Author(s) 2022.

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