RT Journal Article SR Electronic T1 Posterior fossa malformations. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 691 OP 724 VO 13 IS 2 A1 Altman, N R A1 Naidich, T P A1 Braffman, B H YR 1992 UL http://www.ajnr.org/content/13/2/691.abstract AB