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Authors
Kitadai, Rui
Shimoi, Tatsunori
Sudo, Kazuki
Noguchi, Emi
Nagata, Yusuke
Sawada, Ryoichi
Takashima, Atsuo
Boku, Narikazu
Yonemori, Kan
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Article History
Received: 1 January 2021
Accepted: 8 March 2021
First Online: 20 March 2021
Declarations
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: The study protocol was approved by the National Cancer Center Research Ethics Review Committee at National Cancer Center Hospital, Tokyo, Japan (approval numbers: 2012–335 and 2017–229). Research was conducted in accordance with the Declaration of Helsinki. The requirement for informed consent was waived by the Institutional Review Board of National Cancer Center Hospital owing to the retrospective nature of the study. Patients could refuse to participate in this study by an opt-out form on the website of our institution.
: Not applicable.
: The authors declare that they have no competing interests.
