1. Research Fellow, the Laboratory of Cerebral Metabolism, the National Institute of Mental Health, and the Department of Anesthesia, the University of Pennsylvania School of Medicine. Present address: Department of Anesthesia, Massachusetts General Hospital, Boston, Massachusetts 02114
2. Research Biologist, the Laboratory of Cerebral Metabolism, the National Institute of Mental Health
3. Laboratory Technician in Microbiology, the Laboratory of Cerebral Metabolism, the National Institute of Mental Health
4. Chief, the Laboratory of Cerebral Metabolism, the National Institute of Mental Health