About the Authors

Hideyuki Doi

doih@hiroshima-u.ac.jp

Affiliation Institute for Sustainable Sciences and Development, Hiroshima University, Higashi-Hiroshima, Japan

Teruhiko Takahara

Affiliation Institute for Sustainable Sciences and Development, Hiroshima University, Higashi-Hiroshima, Japan

Kazuya Tanaka

Affiliation Institute for Sustainable Sciences and Development, Hiroshima University, Higashi-Hiroshima, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: HD. Performed the experiments: HD TT. Analyzed the data: HD. Wrote the paper: HD TT KT.