About the Authors

Shuichiro Yamamoto

shuichiro.yamamoto.sr@hitachi.com

Affiliation Occupational Health Section, Hitachi, Ltd., Hitachi Health Care Center, Hitachi city, Ibaraki, Japan

Yumi Matsushita

Affiliation Department of Clinical Research, Center for Clinical Sciences, National Center for Global Health and Medicine, Shinjuku-ku, Tokyo, Japan

Toru Nakagawa

Affiliation Occupational Health Section, Hitachi, Ltd., Hitachi Health Care Center, Hitachi city, Ibaraki, Japan

Toru Honda

Affiliation Occupational Health Section, Hitachi, Ltd., Hitachi Health Care Center, Hitachi city, Ibaraki, Japan

Takeshi Hayashi

Affiliation Occupational Health Section, Hitachi, Ltd., Hitachi Health Care Center, Hitachi city, Ibaraki, Japan

Mitsuhiko Noda

Affiliation Department of Endocrinology and Diabetes, Saitama Medical University, Iruma-gun, Saitama, Japan

Tetsuya Mizoue

Affiliation Department of Epidemiology and Prevention, Center for Clinical Sciences, National Center for Global Health and Medicine, Shinjuku-ku, Tokyo, Japan

Competing Interests

S Yamamoto, T Nakagawa, T Honda, and T Hayashi are employed by Hitachi, Ltd. There are no patents, products in development, or marketed products to declare. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials, as detailed online in the guide for authors.

Author Contributions

Conceived and designed the experiments: SY TM. Analyzed the data: SY TN. Contributed reagents/materials/analysis tools: YM T. Hayashi. Wrote the paper: SY TM. Reviewed and edited the manuscript: YM MN T. Honda T. Hayashi.