1. Assistant Professor of Anaesthesia, Harvard Medical School at Massachusetts General Hospital.
2. Professor of Anaesthesia, Harvard Medical School at Massachusetts General Hospital.
3. Associate Professor of Anaesthesia, Harvard Medical School at Massachusetts General Hospital.
4. Clinical Research Coordinator, Department of Anaesthesia, Harvard Medical School at Massachusetts General Hospital.
5. Project Leader, Anesthesia/Analgesia Section, Department of Clinical Neurosciences, Division of Clinical Research, Wellcome Research Laboratories, Burroughs Wellcome Co.
6. Associate Director of Cardiovascular, Autonomic, and Biochemical Pharmacology, Wellcome Research Laboratories, Burroughs Wellcome Co.