About the Authors

Kyoko Nomura

kyoko@med.teikyo-u.ac.jp

Affiliation Teikyo University School of Medicine, Department of Hygiene and Public Health, Tokyo, Japan

Kazuo Inoue

Affiliation Teikyo University School of Medicine, Department of Community Medicine, Tokyo, Japan

Kimihiko Akimoto

Affiliation Yuport, Medical Checkup Center, Tokyo, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: KN KI KA. Performed the experiments: KA. Analyzed the data: KN KI. Contributed reagents/materials/analysis tools: KN. Wrote the paper: KN.