Yasui, Kohei
Shida, Dai
Nakamura, Yuya
Ahiko, Yuka
Tsukamoto, Shunsuke
Kanemitsu, Yukihide
Article History
Received: 14 August 2020
Revised: 29 October 2020
Accepted: 5 November 2020
First Online: 1 December 2020
Ethics approval and consent to participate
: This retrospective study was approved by the Institutional Review Board (IRB) of the National Cancer Center Hospital (IRB code: 2017-437). Since the study involved a retrospective analysis of de-identified data, it was exempt from the requirement for written informed consent. The study was performed in accordance with the Declaration of Helsinki.
: Not applicable.
: All data generated or analysed during this study are included in the paper.
: The authors declare no competing interests.
: None.