Funding for this research was provided by:
Japan Society for the Promotion of Science (26670306, 18H04071)
Text and Data Mining valid from 2019-09-12
Received: 26 January 2019
Accepted: 6 August 2019
First Online: 12 September 2019
Ethics approval and consent to participate
: 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. The protocol was approved by The Research Ethics Committee of the Faculty of Medicine at the University of Tokyo (UMIN Clinical Trials Registry number: UMIN000022396). Informed consent was obtained from all individual participants included in the study.
: Not applicable.
: We declare that the authors have no conflicts of interest with the participating local restaurants. Since the end of this intervention study, WN has received income for part-time work from the Adachi Ward Government (since 2016). The income has been received for duties not related to this study. The authors declare no other relationships or activities that could appear to have influenced the submitted work.