1. Department
of Bioengineering
and Robotics, Graduate School of Engineering, Tohoku University, 6-6-01 Aramaki, Aoba-ku, Sendai
980-8579, Japan
2. JST-CREST, Sanbancho, Chiyoda-ku, Tokyo 102-0075, Japan
3. Faculty of Electronics,
Telecommunication and Informatics, Gdansk University of Technology, ul. Narutowicza 11/12, 80-233
Gdansk, Poland