Frank J A, Choyke P L, Austin H A, Girton M E, Weiss G
Diagnostic Radiology Department, Warren G. Magnuson Clinical Center, National Institute of Health, Bethesda, Maryland.
Invest Radiol. 1991 Nov;26 Suppl 1:S134-6; discussion S137-8. doi: 10.1097/00004424-199111001-00045.