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Takashi Sakamoto is in a speaker\u2019s bureau for SCETI K.K. Takashi Mizowaki has received honoraria from Varian Medical Systems, Inc., Elekta K.K., Hitachi, Ltd., and Brainlab AG; had a consulting or advisory role for Varian Medical Systems, Inc. Hitachi, Ltd.; and has received research funding from Hitachi, Ltd. and educational projects from Varian Medical Systems, Inc. and Brainlab AG. The other authors have no relevant financial or non-financial interests to disclose.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interests"}},{"value":"This study was performed in line with the principles of the Declaration of Helsinki. Approval was granted by the institutional review board of Kyoto University Graduate School and the Faculty of Medicine. (22nd Apr. 2021; approval number R-2944).","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethical approval"}},{"value":"Informed consent was obtained again from the patients who continued to visit the hospital for follow-up evaluations; for patients who could not be followed up due to death or other reasons, consent was obtained based on the opt-out procedures described on the hospital\u2019s website.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent to participate"}},{"value":"Informed consent for the publication of anonymized data was obtained from the patients who provided consent to participate. For patients who could not be followed up due to death or other reasons, consent for publication was obtained through opt-out procedures in accordance with the guidelines posted on the hospital\u2019s website.","order":5,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent to publish"}}]}}