About the Authors

Takashi Nakano

Affiliations Graduate School of Information Science, Nara Institute of Science and Technology, Ikoma, Japan, Okinawa Institute of Science and Technology, Uruma, Japan

Tomokazu Doi

Affiliation Osaka Bioscience Institute, Suita, Japan

Junichiro Yoshimoto

Affiliations Graduate School of Information Science, Nara Institute of Science and Technology, Ikoma, Japan, Okinawa Institute of Science and Technology, Uruma, Japan

Kenji Doya

doya@oist.jp

Affiliations Graduate School of Information Science, Nara Institute of Science and Technology, Ikoma, Japan, Okinawa Institute of Science and Technology, Uruma, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: TN TD. Performed the experiments: TN. Analyzed the data: TN. Contributed reagents/materials/analysis tools: TN. Wrote the paper: TN TD JY KD.