1. Department of Neurology, Osaka University Graduate School of Medicine, Suita, Japan
2. Graduate School of Frontier Biosciences, Osaka University, Suita, Japan
3. Center for Information and Neural Networks (CiNet), Advanced ICT Research Institute, National Institute of Information and Communications Technology, Suita, Japan
4. Department of Precision Engineering, The University of Tokyo School of Engineering, Meguro-ku, Japan
5. Faculty of Science and Engineering, Waseda University, Shinjyuku-ku, Japan
6. Graduate School of Science and Technology, Keio University, Yokohama, Japan
7. Faculty of Human Sciences, Waseda University, Tokorozawa, Japan
8. Department of Psychology, Hokkaido University, Sapporo, Japan