(Nakashima) Research Fellow, Critical Care Medical Center, Yamaguchi University, Ube, Yamaguchi, Japan.
(Todd) Professor and Vice Chairman of Anesthesia, University of Iowa, College of Medicine, Iowa City, Iowa.
Received from the Neuroanesthesia Research Laboratory, Department of Anesthesia, University of Iowa, College of Medicine, Iowa City, Iowa. Submitted for publication January 8, 1996. Accepted for publication March 5, 1996.
Address correspondence to Dr. Todd: Department of Anesthesia, University of Iowa, College of Medicine, 200 Hawkins Drive, Iowa City, Iowa 52242-1079. Address electronic mail to: mtodd@blue.weeg,uiowa.edu.