1. Tokyo Metropolitan University, Hino-shi, Tokyo, Japan
2. National Institute of Advanced Industrial Science and Technology, AIST Tokyo Waterfront BIO-IT, Aomi, Koto-ku, Japan
3. Department of Information Engineering, National Institute of Technology, Oita College, Oita-shi, Oita, Japan
4. Shizuoka University, Naka-ku, Hamamatsu-shi, Shizuoka, Japan