About the Authors

Takeo Fujiwara

tfujiwara@niph.go.jp

Affiliation Section of Behavioral Science, Department of Health Promotion and Research, National Institute of Public Health, Wako-shi, Saitama, Japan

Competing Interests

The author has declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: TF. Analyzed the data: TF. Wrote the paper: TF.