1. Yumoto Institute of Neurology, Kawadacho, Shinjuku-ku, Tokyo, Japan
2. Department of Functional Morphology, Nihon University School of Medicine, Ohyaguchiuemachi, Itabashi-ku, Tokyo, Japan
3. Department of Physics, College of Humanities and Sciences, Nihon University, Sakurajousui, Setagaya-ku, Tokyo, Japan