1. Institute of Innovative Research Tokyo Institute of Technology 4259 Nagatsuta-cho Midori-ku Yokohama 226-8503 Japan
2. Center for Mind/Brain Science (CIMeC) University of Trento Via delle Regole 101 TN 38123 Mattarello Italy
3. PRESTO Japan Science and Technology Agency 4-1-8 Honcho Kawaguchi-shi Saitama 332-0012 Japan
4. Department of Computational Brain Imaging ATR Brain Information Communication Research Laboratory Group 2-2-2 Hikaridai, Seika-cho Soraku-gun Kyoto 619-0288 Japan
5. Integrative Brain Imaging Center National Center of Neurology and Psychiatry 4-1-1 Ogawa-Higashi Kodaira Tokyo 187-8551 Japan