About the Authors

Shinya Kuriki

skuriki@mail.dendai.ac.jp

Affiliation Research Center for Science and Technology, Tokyo Denki University, Inzai, Japan

Koichi Yokosawa

Affiliation Graduate School of Health Science, Hokkaido University, Sapporo, Japan

Makoto Takahashi

Affiliation Graduate School of Information Science and Technology, Sapporo, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SK. Performed the experiments: MT KY. Analyzed the data: SK KY. Wrote the paper: SK.