1. Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Japan.
2. Department of Electrical, Electronics and Information Engineering, Nagaoka University of Technology, Nagaoka, Japan.
3. Tokyo Institute of Technology, Yokohama, Japan.
4. Faculty of Medicine, University of Tsukuba, Tsukuba, Japan.
5. Department of Science of Technology Innovation, Nagaoka University of Technology, Nagaoka, Japan.