RT Journal Article SR Electronic T1 Traumatic avulsion fracture of the occipital condyles and clivus with associated unilateral atlantooccipital distraction. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 1181 OP 1183 VO 11 IS 6 A1 D N Jones A1 A M Knox A1 M R Sage YR 1990 UL http://www.ajnr.org/content/11/6/1181.abstract AB