1. Hamamatsu Photonics K.K., Central Research Laboratory, 5000 Hirakuchi, Hamakita-ku, Hamamatsu, Shizuoka 434-8601, Japan
2. Hamamatsu University School of Medicine, Department of Clinical Pharmacology and Therapeutics, 1-20-1 Handayama, Higashi-ku, Hamamatsu, Shizuoka 431-3192, Japan
3. Oita University Faculty of Medicine, Department of Clinical Pharmacology and Therapeutics, 1-1 Idaigaoka, Hasama-machi, Yufu, Oita 879-5593, Japan
4. Kobe Design University, Applied Physiology Laboratory, 8-1-1 Gakuennishi-machi, Nishi-ku, Kobe 651-2196, Japan