1. Postdoctoral Fellow in Clinical Pharmacology, Department of Medicine, Stanford University School of Medicine.
2. Postdoctoral Fellow in Pharmacology, Department of Pharmacology, University of California School of Medicine.
3. Associate Professor of Anesthesia, Director of Outpatient Anesthesia, Department of Anesthesia, Stanford University School of Medicine.
4. Professor of Pharmacology, Department of Pharmacology, University of California School of Medicine.
5. Associate Professor of Medicine, Chief of Clinical Pharmacology, Department of Medicine, Stanford University School of Medicine.
6. Research Assistant in Anesthesia, Department of Anesthesia, Stanford University School of Medicine.