Funding for this research was provided by:
Ministry of Health, Labour, and Welfare of Japan (H26-ganseisaku-ippan-001, H29-gantaisaku-ippan-019)
National Cancer Center (25-A-16, 28-A-20)
Text and Data Mining valid from 2018-10-04
Received: 26 February 2018
Accepted: 18 September 2018
First Online: 4 October 2018
: All authors are working in the National Cancer Center Japan. YM is currently Head of Health Promotion Science Section and has PhD for health sociology and health promotion. YK, ST, DS, and HO are colorectal cancer surgeons and YK is Department Head of Colorectal Surgery. SY is Director of Health Sociology Division and has Ph. D for epidemiology and biostatistics.
: Ethical approval for this study was obtained with the ethical committee of National Cancer Center (2015–182). 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.Written informed consents is obtained from all individual participants who is included in the study.
: Not applicable
: The authors declare that they have no competing interests.
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