Funding for this research was provided by:
The Ministry of Health, Labour and Welfare of Japan (H23-jitsuyoka(gan)-ippan-002, H23-jitsuyoka(gan)-ippan-002, H14-shokuhin kagaku-015, H14-shokuhin kagaku-015, H17-kagaku-014, H17-kagaku-014, H18-3jigan-ippan-001, H21-3jigan-ippan-002))
The National Institute of Biomedical Innovation (10-41)
Received: 16 February 2017
Accepted: 5 February 2018
First Online: 13 February 2018
Ethics approval and consent to participate
: Written informed consent was obtained from 405 matched pairs. The study protocol was approved by the institutional review boards of the National Cancer Center (2010–188) and the Institute of Medical Science, The University of Tokyo (26-23), Tokyo, Japan.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.