RT Journal Article SR Electronic T1 Spontaneous lumbar subdural hematoma. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 780 OP 781 VO 11 IS 4 A1 J M Levy YR 1990 UL http://www.ajnr.org/content/11/4/780.abstract AB