(Haering, Comunale) Instructor in Anesthesiology.
(Parker) Associate Professor of Medicine (Biostatistics).
(Lowenstein) Professor of Anesthesiology.
(Douglas) Associate Professor of Medicine.
(Krumholz) Assistant Professor of Medicine.
(Manning) Assistant Professor of Medicine and Radiology.
Received from the Departments of Anesthesia and Critical Care, and Medicine, Beth Israel Hospital, Harvard Medical School and the Department of Medicine (Cardiovascular Division), Yale University School of Medicine, New Haven, Connecticut. Submitted for publication January 26, 1996. Accepted for publication March 20, 1996. Supported in part by the Beth Israel Anesthesia Foundation. Dr. Manning is supported in part by the Edward Mallinckrodt, Jr. Foundation, St. Louis, Missouri. Presented in part, in abstract form, at the annual meeting of the American Society of Anesthesiologists, San Francisco, California, October 15–19, 1994.
Address reprint requests to Dr. Haering: Beth Israel Hospital, Department of Anesthesia and Critical Care, 330 Brookline Avenue, Boston, Massachusetts 02215.