 After completing his internship at Johns Hopkins Hospital in Baltimore , Maryland , and a one @-@ year residency at Vanderbilt University Hospital in Nashville , Tennessee , Marston joined the National Institutes of Health ( NIH ) as a medical researcher with the Armed Forces Special Weapons Project , examining the infectious after @-@ effects of whole @-@ body irradiation , from 1951 to 1953 . He finished his residency at MCV in 1954 . 
