About the Authors

Tsuyoshi Hamano

thamano@med.shimane-u.ac.jp

Affiliations Organisation for the Promotion of Project Research, Shimane University, Matsue, Japan, Department of Environmental and Preventive Medicine, Shimane University School of Medicine, Izumo, Japan

Yoshikazu Fujisawa

Affiliation Division of Public Policy, School of Administration and Informatics, University of Shizuoka, Shizuoka, Japan

Yu Ishida

Affiliation Department of General Studies, Akashi National College of Technology, Akashi, Japan

S. V. Subramanian

Affiliation Department of Society, Human Development, and Health, Harvard School of Public Health, Boston, Massachusetts, United States of America

Ichiro Kawachi

Affiliation Department of Society, Human Development, and Health, Harvard School of Public Health, Boston, Massachusetts, United States of America

Kuninori Shiwaku

Affiliation Department of Environmental and Preventive Medicine, Shimane University School of Medicine, Izumo, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: TH YF SVS IK KS. Performed the experiments: TH YF. Analyzed the data: TH YI SVS. Contributed reagents/materials/analysis tools: TH YF SVS. Wrote the paper: TH YF KS.