Kirpekar M, Cooke K S, Abiri M M, Shreefter C
Department of Radiology, St Luke's-Roosevelt Hospital Center, Columbia College of Physicians & Surgeons, New York, NY 10025, USA.
Radiographics. 1997 Jul-Aug;17(4):1003-5. doi: 10.1148/radiographics.17.4.9225398.