1. Instructor, Department of Anesthesia, Georgetown University School of Medicine; Attending Anesthesiologist, The National Institutes of Health, Bethesda, Maryland
2. Clinical Associate, Surgical Branch, National Cancer Institute, The National Institutes of Health, Bethesda, Maryland
3. Professor and Chairman, Department of Anesthesia, Georgetown University School of Medicine; Chief, Aneslhesiology Section, The National Institutes of Health, Bethesda, Maryland