1. Department of Bioproduction Technology, Junior College of Tokyo University of Agriculture, Tokyo 156-8502, Japan
2. Tsukuba Primate Research Center, National Institute of Biomedical Innovation, Tsukuba 305-0843, Japan
3. Department of Neurophysiology, National Institute of Neuroscience (NIN), National Center for Neurology and Psychiatry (NCNP), Tokyo 187-8502, Japan