RT Journal Article SR Electronic T1 Citations and Open Access: Questionable Benefits JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 215 OP 216 DO 10.3174/ajnr.A1325 VO 30 IS 2 A1 M. Castillo YR 2009 UL http://www.ajnr.org/content/30/2/215.abstract AB