| Year | Position | Institution |
| 1968 | Staff Associate | National Institutes Of Health 4 |
| 1969 | Staff Associate | National Institutes Of Health 4 |
| 1970 | Senior Staff Fellow | National Institute Of Neurological Diseases And Stroke 4 |
| 1972 | Senior Staff Fellow | National Institutes Of Health 4 |
| Year | Subject | Role |
| 1968 | Independent | |
| 1969 | Independent | |
| 1970 | Independent | |
| 1971 | Independent | |
| 1972 | Independent |
| Year | Location |
| 1970 | national institutes of health |
| 1971 | national institute of neurological diseases and stroke |