About the Authors

Kenji Kikuchi

kenji@pfsl.mech.tohoku.ac.jp

Affiliation Depertment of Bioengineering and Robotics, Graduated School of Engineering, Tohoku University, Sendai, Japan

Osamu Mochizuki

Affiliation Depertment of Biomedical Engineering, Toyo University, Kawagoe, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

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