1. Fellow in Cardiac Anesthesia, Cardiac Anesthesia Group, Department of Anesthesia, Massachusetts General Hospital. Present address: Department of Anesthesia, Kaiser Permanente Medical Center, 2425 Geary Boulevard, San Francisco, California.
2. Fellow in Cardiac Anesthesia, Cardiac Anesthesia Group, Massachusetts General Hospital. Present address: Department of Anesthesia, New England Deaconess Hospital, Boston, Massachusetts 02155.
3. Fellow in Cardiac Anesthesia, Cardiac Anesthesia Group, Massachusetts General Hospital. Present address: Department of Anesthesia, Emory University Medical School, Atlanta, Georgia 30322.
4. Clinical Reader and Honorary Consultant (Clinical Physiology), Nuffield Department of Anaesthetics, Radcliffe Infirmary, University of Oxford, OX2 6HE England.
5. Professor of Anaesthesia, Harvard Medical School; Anesthetist, Massachusetts General Hospital.