1. Research Division for Life Science Kumamoto Health Science University 325 Izumi‐machi, Kita‐ku Kumamoto 861–5598 Japan
2. Research Division of Neurophysiology Kitamoto Hospital 3‐7‐6 Kawarasone, Koshigaya Saitama 343‐0821 Japan
3. Graduate School of Pharmaceutical Sciences Kumamoto University 5‐1 Oe‐Honmachi, Chuo‐ku Kumamoto 862‐0973 Japan
4. Research Division for Clinical Pharmacology Medical Corporation Juryo Group Kumamoto Kinoh Hospital 6‐8‐1 Yamamuro, Kita‐ku Kumamoto 860‐8518 Japan