1. Department
of Computer Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan,
2. Department
of Computational Intelligence and Systems Science, Tokyo Institute of Technology, 4259 Nagatsuda, Midori-ku, Yokohama 226-8502 Japan
3. Department
of Communication Engineering and Informatics, University of Electro-Communications, 1-5-1 Chofugaoka, Chofu,
Tokyo 182-8585, Japan
4. Center
for iPS Cell Research and Application/The Hakubi Center for Advanced
Research, Kyoto University, 53 Shyogoin-kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
5. Department
of Bioengineering and Robotics, Tohoku University, 6-6-1 Aobayama, Sendai 980-8579, Japan