1 Department of Anesthesiology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto, Tokushima, Tokushima, 770-8503, Japan. hkinoshi@krc.biglobe.ne.jp.
2 Department of Anesthesiology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto, Tokushima, Tokushima, 770-8503, Japan.