Yamaguchi, Ou
Imai, Hisao
Minemura, Hiroyuki
Suzuki, Kensuke
Wasamoto, Satoshi
Umeda, Yukihiro
Osaki, Takashi
Kasahara, Norimitsu
Uchino, Junji
Sugiyama, Tomohide
Ishihara, Shinichi
Ishii, Hisashi
Naruse, Ichiro
Mori, Keita
Kotake, Mie
Kanazawa, Kenya
Minato, Koichi
Kagamu, Hiroshi
Kaira, Kyoichi
Article History
Received: 3 December 2019
Accepted: 3 March 2020
First Online: 19 March 2020
Compliance with ethical standards
:
: None of the authors has any financial or personal relationships with people or organizations that could inappropriately influence this work.
: This study has been approved by The Gunma Prefectural Cancer Center Ethics Committee on 27 September 2018 (ethic code: 405-30051). All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: The need for informed consent was waived by the institutional review boards of the participating institutions because of the retrospective nature of the study.