About the Authors

Masashi Soga

soga06154053@yahoo.co.jp

Affiliation Tokyo University of Agriculture and Technology, 3-5-8 Saiwaicho, Fuchu, Tokyo 183-8509, Japan

Shinsuke Koike

Affiliation Tokyo University of Agriculture and Technology, 3-5-8 Saiwaicho, Fuchu, Tokyo 183-8509, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

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