About the Authors

Yoshiyuki Tamamiya

tamamiya@ardbeg.c.u-tokyo.ac.jp

Affiliation Graduate School of Arts and Sciences, the University of Tokyo, Tokyo, Japan

Kazuo Hiraki

Affiliation Graduate School of Arts and Sciences, the University of Tokyo, Tokyo, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

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