About the Authors

Shingo Iwami

Affiliation Graduate School of Science and Technology, Shizuoka University, Shizuoka, Japan

Takafumi Suzuki

Affiliation Graduate School of Engineering, Shizuoka University, Shizuoka, Japan

Yasuhiro Takeuchi

takeuchi@sys.eng.shizuoka.ac.jp

Affiliation Graduate School of Science and Technology, Shizuoka University, Shizuoka, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Analyzed the data: SI TS YT. Contributed reagents/materials/analysis tools: SI TS YT. Wrote the paper: SI.