1. Department of Molecular Genetics, Institute of Biomedical Sciences, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan.
2. Core Research for Evolutional Science and Technology, Japan Science and Technology Agency, Kawaguchi 332-0012, Japan.
3. Systems Neuroscience Section, Primate Research Institute, Kyoto University, Inuyama 484-8506, Japan.
4. Division of Neurobiology and Bioinformatics, National Institute for Physiological Sciences, Okazaki 444-8787, Japan.
5. Department of Biochemistry and Molecular Biology, Nippon Medical School, Tokyo 183-8526, Japan.