About the Authors

Mitsuhiro Nakamura, Naoki Masuda
Department of Mathematical Informatics, The University of Tokyo, Tokyo, Japan

Naoki Masuda
PRESTO, Japan Science and Technology Agency, Kawaguchi, Japan

Corresponding Author

masuda@mist.i.u-tokyo.ac.jp

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MN NM. Performed the experiments: MN. Analyzed the data: MN. Contributed reagents/materials/analysis tools: MN NM. Wrote the paper: MN NM.