1. M. Yokoi and S. Nakanishi, Department of Biological Sciences (formerly Institute for Immunology), Kyoto University Faculty of Medicine, Kyoto 606, Japan.
2. K. Kobayashi, T. Manabe, T. Takahashi, Department of Neurophysiology, Institute for Brain Research, Faculty of Medicine, University of Tokyo, Tokyo 113, Japan.
3. I. Sakaguchi and G. Katsuura, Aburahi Laboratories, Shionogi and Company, Ltd., Shiga 520-34, Japan.
4. R. Shigemoto and H. Ohishi, Department of Morphological Brain Science, Kyoto University Faculty of Medicine, Kyoto 606, Japan.
5. S. Nomura, College of Medical Technology, Kyoto University, Kyoto 606, Japan.
6. K. Nakamura, K. Nakao, M. Katsuki, Medical Institute of Bioregulation, Kyushu University, Fukuoka 812, Japan.