Kitao, Tomoka
Shiga, Tohru
Hirata, Kenji
Sekizawa, Mitsunori
Takei, Toshiki
Yamashiro, Katsushige
Tamaki, Nagara
Article History
Received: 2 July 2018
Accepted: 3 September 2018
First Online: 8 September 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interests.
: This retrospective study was approved by the institutional ethics committee of Hokkaido Cancer Center. The informed consent was waived from individual participants in the retrospective study according to the institutional ethics committee of Hokkaido Cancer Center (#27-43). Patient records/information was anonymized and de-identified prior to analysis.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.