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Hayashi et al. Mini-invasive Surg 2022;6:7 https://dx.doi.org/10.20517/2574-1225.2021.125 Page 7 of 8

Conception and design, drafting of the article, critical revision of the article for important intellectual
content, and final approval of the article: Yamamoto H

Availability of data and materials
Not applicable.

Financial support and sponsorship
None.

Conflicts of interest
Hironori Yamamoto has a patent for the small-caliber-tip transparent (ST) hood produced by the Fujifilm
Corporation. The hood was used for ESD and shown in these pictures. He also has a consultant relationship
with the Fujifilm Corporation and has received honoraria, grants, and royalties from the company. Other
authors declared that there are no conflicts of interest.

Ethical approval and consent to participate
Not applicable.

Consent for publication
Not applicable.

Copyright
© The Author(s) 2022.

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