[1] Keio Univ, Sch Med, Dept Med, Shinjuku Ku, Tokyo 1608582, Japan
[2] Keio Univ, Sch Med, Dept Anesthesiol, Tokyo 1608582, Japan
[3] Tokyo Womens Med Univ, Daini Hosp, Dept Anesthesiol & Intens Care, Tokyo, Japan
[4] Kyoto Prefectural Univ Med, Dept Anesthesiol & Intens Care, Kyoto, Japan
[5] Tohoku Univ, Inst Dev Aging & Canc, Sendai, Miyagi 980, Japan
[6] Shino Test Corp, Cent Inst, Kanagawa, Japan
[7] Ono Pharmaceut Co Ltd, Osaka, Japan
[8] Univ Alabama Birmingham, Dept Med, Birmingham, AL 35294 USA