[1] Japan Air Self Def Force, Med Clin Hamamatsu Base, Hamamatsu, Shizuoka 4328551, Japan
[2] Natl Def Med Coll, Dept Anesthesiol, Tokorozawa, Saitama 359, Japan
[3] Gifu Hosp, Japan Air Self Def Force, Kagamihara, Japan
[4] Tokyo Womens Med Univ, Dept Anesthesiol, Tokyo, Japan
[5] Shiki Citizen Hosp, Dept Anesthesia, Shiki, Japan