1. Resident of Anesthesia, Department of Anesthesia, Georgetown University School of Medicine, Washington, D. C. 20007.
2. Physical Sciences Project Officer, Division of Cancer Treatment, National Cancer Institute, Bethesda, Maryland 20014.
3. Assistant Professor, Department of Anesthesia, Georgetown University School of Medicine; Attending Anesthesiologist, National Institutes of Health. Bethesda, Maryland 20014.