Hubbert T E, Vucich J J, Armstrong M R
Department of Radiology (Henry M. Jackson Foundation), Warren G. Magnuson Clinical Center, National Institutes of Health, Bethesda, MD 20892.
AJR Am J Roentgenol. 1993 Nov;161(5):1079-81. doi: 10.2214/ajr.161.5.8273614.