About the Authors

Sotaro Shimada

sshimada@isc.meiji.ac.jp

Affiliation Department Electronics and Bioinformatics, School of Science and Technology, Meiji University, Tama-ku, Kawasaki, Japan

Kensuke Fukuda

Affiliation Department Electronics and Bioinformatics, School of Science and Technology, Meiji University, Tama-ku, Kawasaki, Japan

Kazuo Hiraki

Affiliations Department General Systems Studies, The University of Tokyo, Meguro-ku, Tokyo, Japan, Interfaculty Initiative in Information Studies, The University of Tokyo, Meguro-ku, Tokyo, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SS KH. Performed the experiments: KF. Analyzed the data: SS KF. Wrote the paper: SS KH.