About the Authors

Mayuko Nakamaru

nakamaru@valdes.titech.ac.jp

Affiliation Tokyo Institute of Technology, O-okayama, Meguro, Tokyo, Japan

Akira Yokoyama

Affiliation Tokyo Institute of Technology, O-okayama, Meguro, Tokyo, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MN. Performed the experiments: AY. Analyzed the data: AY MN. Contributed to the writing of the manuscript: MN AY.