RT Journal Article SR Electronic T1 Society for Spine Radiology JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 1422 OP 1422 VO 14 IS 6 A1 Jeffrey S. Ross YR 1993 UL http://www.ajnr.org/content/14/6/1422.abstract AB