(Isono, Tagaito) Assistant Professor.
(Tanaka, Sho) Staff Anesthesiologist.
(Nishino) Professor of Anesthesiology.
Received from the Department of Anesthesiology, Chiba University School of Medicine, Chiba, Japan. Submitted for publication January 30, 1997. Accepted for publication May 19, 1997.
Address reprint requests to Dr. Isono: Department of Anesthesiology, Chiba University School of Medicine, 1–8–1 Inohanacho, Chuo-ku, Chiba, 260, Japan. Address electronic mail to: isonos@doc.ho.chiba-u.ac.jp.