Fleckenstein J L, Purdy P D, Mendelsohn D B, Chason D P, Ginsburg M I, Samson D S
Department of Radiology, University of Texas Southwestern Medical Center 75235-8896, USA.
Radiology. 1997 Mar;202(3):640; discussion 641-2. doi: 10.1148/radiology.202.3.9051009.