RT Journal Article SR Electronic T1 Regarding the Risk of Death from CT Angiography in Patients with Subarachnoid Hemorrhage JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP e44 OP e44 DO 10.3174/ajnr.A0954 VO 29 IS 6 A1 Livingston, Robert R. YR 2008 UL http://www.ajnr.org/content/29/6/e44.abstract AB