1. Division of Integrative Physiology; Tottori University Faculty of Medicine; 86 Nishi-cho Yonago Tottori 683-8503 Japan
2. Department of Integrative Physiology; Nagoya University Graduate School of Medicine; 65 Tsurumai-cho Showa-ku Nagoya 466-8550 Japan
3. PRESTO; Japan Science and Technology Agency; 4-1-8 Honcho Kawaguchi Saitama 332-0012 Japan