Funding for this research was provided by:
Japan Society for the Promotion of Science (JP16K10398)
National Cancer Center Research and Development Fund (29–A–3, 30-A-14)
Grant-in-Aid for Young Scientists (B) from the Ministry of Education, Culture, Sports, Science and Technology (18K15613)
Received: 18 January 2019
Accepted: 18 July 2019
First Online: 29 July 2019
Ethics approval and consent to participate
: The clinical trial JCOG1402 was approved by the Institutional Ethical Review Board of the National Cancer Center Hospital (Approval number: 2015–359).
: Not applicable.
: The authors declare that they have no competing interests.