(Lee) Undergraduate Student, Harvard University.
(Iyengar) Undergraduate Student, University of California, Berkeley.
(Szenohradszky, Wright) Assistant Professor of Anesthesia.
(Caldwell) Associate Professor of Anesthesia.
(Brown, Lau) Staff Research Associate.
(Luks) Research Fellow.
(Fisher) Professor of Anesthesia and Pediatrics.
Received from the Department of Anesthesia, University of California, San Francisco. Submitted for publication May 31, 1996. Accepted for publication September 12, 1996. Supported in part by funds from the Anesthesia Research Foundation.
Address correspondence to Dr. Fisher: Department of Anesthesia, University of California, San Francisco, 521 Parnassus Ave., San Francisco, California 94143–0648. Address electronic mail to fisher@zachary.ucsf.edu.