Asano, Kenichiro http://orcid.org/0000-0002-4147-4312
Yamashita, Yoji
Ono, Takahiro
Natsumeda, Manabu
Beppu, Takaaki
Matsuda, Kenichiro
Ichikawa, Masahiro
Kanamori, Masayuki
Matsuzaka, Masashi
Kurose, Akira
Saito, Kiyoshi
Sonoda, Yukihiko
Ogasawara, Kuniaki
Fujii, Yukihiko
Shimizu, Hiroaki
Ohkuma, Hiroki
Kitanaka, Chifumi
Kayama, Takamasa
Tominaga, Teiji
Article History
Received: 14 April 2021
Accepted: 29 September 2021
First Online: 12 October 2021
Declarations
:
: M. Natsumeda has received honoraria from Novocure; Y. Sonoda has received honoraria from Eisai, Dai-ichi Sankyo, and Chugai and research grants from Astellas, Eisai, Otsuka, Dai-ichi Sankyo, Chugai, Tsumura, Bayer, Pfizer, Fuji-film, and HOYA PENTAX; K. Asano, Y. Yamashita, T. Ono, T. Beppu, K. Matsuda, M. Ichikawa, M. Kanamori, M. Matsuzaka, A. Kurose, K. Saito, K. Ogasawara, Y. Fujii, H. Shimizu, H. Ohkuma, C. Kitanaka, T. Kayama, and T. Tominaga have no conflict of interest to declare.
: This study was conducted with the approval of the ethics committees of Hirosaki University Graduate School of Medicine (2018-118) and individual institutions. In addition, since this was a retrospective study, notifications to patients to opt-out were given on the homepage of each hospital.
: The institutional review board waived the requirement for informed consent, owing to the retrospective nature of the study. However, the details of the study are posted on the hospital’s homepage (ExternalRef removed).
: Not applicable.