About the Authors

Ken Takiyama, Masato Okada
Graduate School of Frontier Sciences, The University of Tokyo, Complex Science and Engineering, Chiba, Japan

Masato Okada
RIKEN Brain Science Institute, Wako, Japan

Corresponding Author

okada@k.u-tokyo.ac.jp

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

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