1. Research Associate.
2. Assistant Research Professor, Department of Anesthesiology.
3. Assistant Professor, Department of Medicine (Neurology).
4. Radiation Neuroscience Laboratories, Department of Radiation Medicine, Loma Linda University Medical Center, Loma Linda, California.
5. Assistant Research Professor, Department of Surgery.
6. Professor, Departments of Anesthesiology, Neurobiology, and Surgery, Duke University Medical Center.