1. Assistant Professor of Anesthesiology, Department of Anesthesia, University of Pennsylvania School of Medicine. Present address: Department of Anesthesia, Peter Bent Brigham Hospital and Harvard Medical School, Boston.
2. Assistant Professor of Medicine, Department of Medicine, University of Pennsylvania School of Medicine.
3. Research Fellow, Department of Anesthesia, University of Pennsylvania School of Medicine.
4. Assistant Instructor, Department of Anesthesia, University of Pennsylvania School of Medicine, Philadelphia.