Nakamura, Kazuto
Yamashita, Soichi
Kigure, Keiko
Nishimura, Toshio
Ito, Ikuro
Azuma, Anri
Nakao, Kohshiro
Ando, Ken
Kanuma, Tatsuya
Article History
Received: 27 December 2022
Accepted: 17 April 2023
First Online: 20 April 2023
Declarations
:
: This study was approved by the Ethics Committee of Gunma Prefectural Cancer Center (approval # 405–31012). The study protocol was approved by the Gunma University Hospital Clinical Research Review Board and Ethics Review Committee of the National Hospital Organization Takasaki General Medical Center. All methods were performed in accordance with relevant guidelines and regulations (Declaration of Helsinki).Informed consent was not obtained from all study participants. According to the ethical guidelines for medical and health research involving human subjects in Japan, informed consent is not required for medical studies that use only medical records without human samples, and the analysis is conducted with anonymized data. Thus, informed consent was waived by The Ethics Committees of Gunma Prefectural Cancer. However, all patients were provided the right to withdraw their consent for the use of data using the opt-out method on the Gunma Prefectural Cancer Center website in 2022. The Ethics Committees of Gunma Prefectural Cancer Center approved the opt-out method for obtaining participant consent for this study.
: Not applicable.
: The authors declare that they have no competing interests.